T. M. Aliev's research while affiliated with Middle East Technical University and other places
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Publications (675)
In this study, the strong coupling constants of the unobserved heavy axial tensor mesons to the heavy vector and pseudoscalar $\pi$ and $K$ mesons, $D_2 D^* \pi$, $D_{s2} D^* K$, $B_2 B^* \pi$, $B_{s2} B^* K$ as well as a heavy axial tensor to axial vector and light pseudoscalar $\pi$ and $K$-mesons, $D_2 D_1 \pi$, $D_{s2} D_1 K$, $B_2 B_1 \pi$, $B...
The semileptonic Ωc0→Ω−lν and nonleptonic Ωc0→Ω−π+, Ωc0→Ω−ρ+ decays of the charmed Ωc baryon are studied within the light cone sum rules. The form factors responsible for Ωc→Ω transitions are calculated using the distribution amplitudes of the Ωc baryon. With the obtained form factors, the branching ratios of Ωc0→Ω−l+νl, Ωc0→Ω−π+, and Ωc0→Ω−ρ+ deca...
With the discovery of the doubly heavy $$\Xi _{cc}$$ Ξ cc baryon, comprehensive studies of the properties of the doubly heavy baryons are started. In the present work, we examine the $$\Xi _{bb} \rightarrow \Sigma _b \ell ^+ \ell ^-$$ Ξ bb → Σ b ℓ + ℓ - and $$\Xi _{cc} \rightarrow \Sigma _c \ell ^+ \ell ^-$$ Ξ cc → Σ c ℓ + ℓ - decays induced by fla...
The semileptonic $\Omega_c^0 \rightarrow \Omega^- l \nu$ and non-leptonic $\Omega_c^0 \to \Omega^- \pi^+$, $\Omega_c^0 \to \Omega^- \rho^+$ decays of charmed $\Omega_c$ baryon are studied within the light cone sum rules. The form factors responsible for $\Omega_c \to \Omega$ transitions are calculated using the distribution amplitudes of $\Omega_c$...
The weak decays of doubly heavy ΞQQ baryon induced by flavor changing b→d and c→u flavor changing neutral current within the light-cone sum rules are studied. The sum rules are constructed and analyzed for the corresponding transition form factors using the parallel components of the light-cone distribution amplitudes for ΛQ baryon. Having the resu...
With the discovery of the doubly heavy $\Xi_{cc}$ baryon, comprehensive studies of the properties of the doubly heavy baryons are started. In the present work, we examine the $\Xi_{bb} \to \Sigma_b \ell^+ \ell^-$ and $\Xi_{cc} \to \Sigma_c \ell^+ \ell^-$ decays induced by flavor-changing neutral currents (FCNC) in the framework of the light-cone su...
The weak decays of doubly heavy $\Xi_{QQ}$ baryon induced by flavor changing $b \to d$ and $ c \to u$ flavor changing neutral current within the light cone sum rules are studied. Using the parallel components of the light cone distribution amplitudes for $\Lambda_Q$ baryon, the sum rules are constructed and analyzed for the corresponding transition...
Motivated by the recent discovery of a new tetraquark Tcc+ state with two charm quarks and two light quarks by LHCb Collaboration, we calculate the spectroscopic parameters; namely, the mass and residues of beauty partners of Tcc+ within QCD sum rules. The obtained results are compared with the predictions of different approaches in the literature.
The study of the properties of doubly heavy baryons represents a promising area in particle physics. It can provide us with information about Cabibbo-Kobayashi-Maskawa (CKM) matrix elements and the low energy dynamics of QCD. They have a very rich phenomenology. The investigation of weak, electromagnetic, and strong decays has vital importance for...
In this paper magnetic dipole moment form factor, [Formula: see text], describing the radial excitation of decuplet baryons to octet baryons electromagnetic transitions as well as the ratios, [Formula: see text] and [Formula: see text] are calculated in the framework of light-cone sum rules. We also estimate the degree of the violation of U-spin sy...
Motivated by the recent discovery of a new tetra-quark $T_{cc}^+$ state with two charm quarks and two light quarks by LHCb collaboration, we calculate the spectroscopic parameters, namely, the mass and residues of beauty partners of $T_{cc}^+$ within QCD sum rules by using hadronic molecular $BB^*$ picture. The obtained results are compared with th...
We estimate the strong coupling constants of charmed and bottom mesons D(s)*, D(s)1, B(s)*, and B(s)1 with light vector mesons ρ, ω, K*, and ϕ within the framework of light-cone QCD sum rules. We take into account the contributions of two- and three-particle distribution amplitudes of light vector mesons of twist-2, -3, and -4, and determine the va...
Form factors of the weak Ξc→Ξ(Λ) transitions are calculated within the light cone QCD sum rules. The pollution coming from the contribution of the negative parity Ξc* baryon is eliminated by considering the combinations of sum rules corresponding to the different Lorentz structures. Having obtained the form factors, the branching ratios of the Ξc→Ξ...
Form factors of the weak $\Xi_c \to \Xi(\Lambda)$ transitions are calculated within the light cone QCD sum rules. The pollutions coming from the contribution of the negative parity $\Xi_c^*$ baryon is eliminated by considering the combinations of sum rules corresponding to the different Lorentz structures. Having obtained the form factors, the bran...
We estimate the strong coupling constants of charmed and bottom mesons $ D_{(s)}^* $, $ D_{s(1)} $, $ B_{(s)}^* $, and $ B_{s(1)} $ with light vector mesons $ \rho $, $ \omega $, $ K^* $, and $ \phi $ within the framework of light-cone QCD sum rules. We compare our estimations to the ones predicted by other approaches.
The strong coupling constants of spin-3/2 to spin-1/2 doubly heavy baryon transitions with light vector mesons are estimated within the light-cone QCD sum rules method. Moreover, using the vector-meson dominance ansätz, the widths of radiative decays BQQ∗→BQQγ are calculated. The results for the said decay widths are compared to the predictions of...
In this paper, we analyze the vertices of doubly heavy spin-3/2–spin-1/2 baryons with light mesons within the method of light-cone QCD sum rules. These vertices are parametrized in terms of one (three) coupling constant(s) for the pseudoscalar (vector) mesons. The said coupling constants are calculated for all possible transitions. The results pres...
By using the quark part of the energy-momentum tensor current, the gravitational formfactors of the ρ, π, and K mesons are calculated within the light-cone sum rules method. In the considered version, the energy-momentum tensor current is not conserved and as a result, for integer spin J, there appear 4J+2 (2J+1) formfactors, which correspond to th...
The strong coupling constants of spin-3/2 to spin-1/2 doubly heavy baryon transitions with light vector mesons are estimated within the light-cone QCD sum rules method. Moreover, using the vector-meson dominance ans\"atz, the widths of radiative decays $ B_{QQ}^* \to B_{QQ} \gamma $ are calculated. The results for the said decay widths are compared...
Magnetic dipole moment form factor, $G_M^{(2)}(Q^2)$, describing the radial excitation of decuplet baryons to octet baryons electromagnetic transitions as well as the ratios, $R_{SM} = -\frac{1}{4 m_2^2} \sqrt{4 m_2^2 Q^2 + (m_2^2 - Q^2 -m_1^2)^2} \frac{G_C^{(2)}(Q^2)}{G_M^{(2)}(Q^2)}$ and $R_{EM} = -\frac{G_E^{(2)}(Q^2)}{G_M^{(2)}(Q^2)}$ are calcu...
In this paper, we analyze the doubly heavy spin-3/2--spin-1/2 baryons and light meson vertices within the method of light-cone QCD sum rules. These vertices are parametrized in terms of one (three) coupling constant(s) for the pseudoscalar (vector) mesons. The said coupling constants are calculated for all possible transitions. The results presente...
The strong coupling constant of doubly heavy baryons with light pseudoscalar mesons π and K are computed within the light cone sum rules. We take into account two-particle and three-particle distribution amplitudes of the said pseudoscalar mesons. We compare our result with the one existing in the literature.
Using the most general form of the interpolating current for baryons, the strong electric and magnetic coupling constants of light vector mesons \( \rho \) and \( K^* \) with doubly heavy baryons are computed within the light-cone sum rules. We consider 2- and 3-particle distribution amplitudes of the aforementioned vector mesons. The obtained resu...
Taking into account only the quark part of the energy-momentum tensor, the gravitational form-factors of the $ \pi $ and $ K $ mesons are calculated within the light-cone sum rules method using the distribution amplitudes of these pseudoscalar mesons. The $ Q^2 $-dependence of the relevant form-factors are obtained. Moreover, the mean square mass r...
Using the most general form of the interpolating current for baryons, the strong electric and magnetic coupling constants of light vector mesons $ \rho $ and $ K^* $ with doubly heavy baryons are computed within the light-cone sum rules. We consider 2- and 3-particle distribution amplitudes of the aforementioned vector mesons. The obtained results...
The strong coupling constant of doubly heavy baryons with light pseudoscalar mesons $ \pi $ and $ K $ are computed within the light cone sum rules. We take into account two-particle and three-particle distribution amplitudes of the said pseudoscalar mesons. We compare our result with the one existing in the literature.
By using the quark part of the energy-momentum tensor current, the gravitational formfactors of the $ \rho $ meson are calculated within the light-cone sum rules method. In the considered version, the energy-momentum tensor current is not conserved and as a result, there appear nine formfactors, six (three) of which correspond to the conservation (...
The form factors of γ*N→Δ(1600) transition is calculated within the light-cone sum rules assuming that Δ+(1600) is the first radial excitation of Δ(1232). The Q2 dependence of the magnetic dipole G˜M(Q2), electric quadrupole G˜E(Q2), and Coulomb quadrupole G˜c(Q2) form factors are investigated. Moreover, the Q2 dependence of the ratios REM=−G˜E(Q2)...
The form factors of $\gamma^* N \rightarrow \Delta(1600)$ transition is calculated within the light-cone sum rules assuming that $\Delta^+(1600)$ is the first radial excitation of $\Delta(1232)$. The $Q^2$ dependence of the magnetic dipole $\tilde{G}_M(Q^2)$, electric quadrupole $\tilde{G}_E(Q^2)$, and Coulomb quadrupole $\tilde{G}_c(Q^2)$ form fac...
The magnetic and quadrupole moments of the vector and axial-vector mesons containing a heavy quark are estimated within the light-cone sum rules method. Our predictions on magnetic moments for the vector mesons are compared with the results obtained by other approaches.
The magnetic and quadrupole moments of the vector and axial-vector mesons containing heavy quark are estimated within the light cone sum rules method. Our predictions on magnetic moments for the vector mesons are compared with the results obtained by other approaches.
We present a new calculation of the semileptonic tree-level and flavor-changing neutral current form factors describing B-meson transitions to tensor mesons T=D2*, K2*, a2, f2 (JP=2+). We employ the QCD light-cone sum rules approach with B-meson distribution amplitudes. We go beyond the leading-twist accuracy and provide analytically, for the first...
The form-factors for the transition N*(1535)→N induced by isovector and isoscalar axial currents within the framework of light cone QCD sum rules by using the most general form of the interpolating current are calculated. In numerical calculations, we use two sets of values of input parameters. It is observed that the Q2 dependence of the form-fact...
We present a new calculation of the semileptonic tree-level and FCNC form factors describing $B$-meson transitions to tensor mesons $T=D_2^*,K_2^*,a_2,f_2$ ($J^{P}=2^{+}$). We employ the QCD Light-Cone Sum Rules approach with $B$-meson distribution amplitudes. We go beyond the leading-twist accuracy and provide analytically, for the first time, hig...
The mass and leptonic decay constants of recently observed two new excited Bc states at LHC are studied within the QCD sum rules. Considering the contributions of the ground and radially excited states, the mass and residues of the excited states of pseudoscalar and vector mesons are calculated in the framework of two different approaches of the QC...
The form-factors for the transition $ N^*(1535)\to N $ induced by isovector and isoscalar axial currents within the framework of light-cone QCD sum rules by using the most general form of the interpolating current are calculated. In numerical calculations, we use two sets of values of input parameters. It is observed that the $ Q^2 $ dependence of...
The mass and leptonic decay constants of recently observed two new excited $B_c$ states at LHC are studied within the QCD sum rules. Considering the contributions of the ground and radially excited states, the mass and residues of the excited states of pseudoscalar and vector mesons are calculated in the framework of two different approaches of the...
Recent experimental progress has led to the detection of many new hadrons. Very recently, the LHCb Collaboration announced the observation of two new Σb(6097)± states in the Λb0π± invariant mass distribution, which are considered to be the excited states of the ground-state Σb(*) baryon. Although almost all of the ground-state baryons have been obs...
The form factors of the \(\Lambda _{b} \rightarrow N^*\ell ^+ \ell ^-\) decay are calculated in the framework of the light cone QCD sum rules. In the calculations the contribution of the negative parity \(\Lambda _b^*\) baryon is eliminated by constructing the sum rules for different Lorentz structures. Furthermore the branching ratio of the semile...
The radiative decays of the p-wave charmed heavy baryons to the ground state baryon states are studied in the framework of the light cone QCD sum rules method. Firstly, the transition form factors that describe these transitions are estimated and then, using these form factors, the corresponding decay widths are calculated. A comparison of our resu...
The mass and residues of the first radial and orbital excitations of $J=\frac{1}{2}$ baryons containing two heavy quarks (b or c) are calculated within the QCD sum rules method. In calculations, the general forms of the interpolating currents with symmetric and anti-symmetric forms with respect to the exchange of heavy quarks have been used. Our re...
The radiative decays of the p-wave charmed heavy baryons to the ground state baryon states are studied in the framework of the light cone QCD sum rules method. Firstly, the transition form factors that describe these transitions are estimated, and then using these form factors the corresponding decay widths are calculated. A comparison of our resul...
The mass and residues of the first radial and orbital excitations of J=[Formula presented] baryons containing two heavy quarks (b or c) are calculated within the QCD sum rules method. In calculations, the general forms of the interpolating currents with symmetric and anti-symmetric forms with respect to the exchange of heavy quarks have been used....
The form factors of the $\Lambda_{b} \rar N^\ast \ell^+ \ell^-$ decay are calculated in the framework of the light cone QCD sum rules. In the calculations the contribution of the negative parity $\Lambda_b^\ast$ baryon is eliminated by constructing the sum rules for different Lorentz structures. Furthermore the branching ratio of the semileptonic $...
The transition form factors of the radiative decays of the heavy tensor mesons to heavy pseudoscalar and heavy vector mesons are calculated in the framework of the light-cone QCD sum rules method at the point Q2=0. Using the obtained values of the transition form factors at the point Q2=0, the corresponding decay widths are estimated. The results s...
We explore the recently observed Ξb(6227)− resonance to fix its quantum numbers. To this end, we consider various possible scenarios: It can be considered as either a 1P or 2S excitation of the Ξb− and Ξb′(5935) ground-state baryons with spin-12 or the 1P or 2S excitation of the ground-state Ξb(5955) with spin-32. We calculate the masses of the pos...
The progresses in the experimental sector has been the harbinger of the observations of many new hadrons. Very recently, LHCb Collaboration announced the observation of two new $\Sigma_b(6097)^{\pm}$ states in the $\Lambda^0_b\pi^{\pm}$ invariant mass distribution, which are considered as the excited states of the ground state $\Sigma^{(*)}_b$ bary...
We extend our previous analysis on the mass of the recently discovered \(\Omega (2012)\) state by investigation of its strong decays and calculation of its width employing the method of light cone QCD sum rule. Considering two possibilities for the quantum numbers of \(\Omega (2012)\) state, namely 1P orbital excitation with \(J^P=\frac{3}{2}^-\) a...
The transition form factors of the radiative decays of the heavy tensor mesons to heavy pseudoscalar and heavy vector mesons are calculated in the framework of the light cone QCD sum rules method at the point $Q^2=0$. Using the obtained values of the transition form factors at the point $Q^2=0$ the corresponding decay widths are estimated. The resu...
By assuming that the \( f_0\) and \( a_0^0\) mesons are mixed states of the two-quark-tetraquark, the mixing angle between them is estimated within the QCD sum rules method, and it is obtained that the mixing angle is \( (6.03 \pm 0.08)^\circ\) . Our prediction on the mixing angle can be checked in further experiments which can shed light on choosi...
The single charmed excited \(\Xi_{c}(2930)\) state was discovered many years ago by the BABAR Collaboration and recently confirmed by Belle experiment. However, both these experiments, unfortunately, could not fix the quantum numbers of this particle and its nature is under debate. In the present study, we calculate its mass and the width of its do...
By assuming that the $f_0$ and $a_0^0$ mesons are mixed states of the two-quark - tetraquark, the mixing angle between them is estimated within QCD sum rules method, and it is obtained that the mixing angle is $(6.03 \pm 0.08)^\circ$. Our prediction on mixing angle can be checked in further experiments which can shed light on choosing the "right" s...
In the present study we explore the recently observed $\Xi_b(6227)^{-}$ resonance to fix its quantum numbers. To this end we consider various possible scenarios: it can be considered as either orbital/radial excitations of the $\Xi_b^-$ and $\Xi_b'(5935)^{-}$ ground state baryons with spin-$\frac{1}{2}$ or orbital/radial excitations of the ground s...
Form factors of the rare Λb(Λb*)→Nℓ+ℓ− decays are calculated in the framework of the light cone QCD sum rules by taking into account the contributions from the negative parity baryons. Using the obtained results on the form factors, the branching ratios of the considered decays are estimated. The numerical survey for the branching ratios of the Λb→...
Very recently, Belle Collaboration reported observation of a narrow state called Ω(2012) with mass 2012.4±0.7(stat)±0.6(syst) MeV and width 6.4−2.0+2.5(stat)±1.6(syst) MeV. We calculate the mass and residue of the Ω(2012) state by employing the QCD sum rule method. Comparison of the obtained results with the experimental data allows us to interpret...
Form factors of the rare $\Lambda_{b}(\Lambda_{b}^*)\to N\ell^{+}\ell^{-}$ decays are calculated in the framework of the light cone QCD sum rules by taking into account of the contributions from the negative parity baryons. Using the obtained results on the form factors, the branching ratios of the considered decays are estimated. The numerical sur...
We extend our previous analysis on the mass of the recently discovered $\Omega(2012)$ state by investigation of its strong decays and calculation of its width employing the method of light cone QCD sum rule. Considering two possibilities for the quantum numbers of $\Omega(2012)$ state, namely $1P$ orbital excitation with $J^P=\frac{3}{2}^-$ and $2S...
Very recently Belle Collaboration reported observation of a narrow state called $\Omega(2012)$ with mass [$2012.4 \pm 0.7$~(stat)~$\pm 0.6$(syst)]~MeV and width [$6.4^{+2.5}_{-2.0}$~(stat)~$\pm 1.6$~(syst)]~MeV. We calculate the mass and residue of $\Omega(2012)$ state by employing the QCD sum rule method. Comparison of the obtained results with th...
The strong coupling constants of newly observed Ωc0 baryons with spins J=1/2 and J=3/2 decaying into Ξc+K- are estimated within light cone QCD sum rules. The calculations are performed within two different scenarios on quantum numbers of Ωc baryons: (a) all newly observed Ωc baryons are negative parity baryons; that is, the Ωc(3000) , Ωc(3050) , Ωc...
The strong coupling constants of newly observed $\Omega_c^0$ baryons with spin $J = \frac{1}{2}$ and $J = \frac{3}{2}$ decaying into $\Xi_c^{+} K^{-}$ are estimated within light cone QCD sum rules. The calculations are performed within two different scenarios on quantum numbers of $\Omega_c$ baryons: a) all newly observed $\Omega_c$ baryons are neg...
The mass and pole residue of the first orbitally and radially excited $ \Xi$ state as well as the ground state residue are calculated by means of the two-point QCD sum rules. Using the obtained results for the spectroscopic parameters, the strong coupling constants relevant to the decays $\Xi(1690)\rightarrow \Sigma K$ and $\Xi(1690) \rightarrow \L...
We present a study for two-quark light-cone distribution amplitudes for the 1³D2 light tensor meson states with quantum number JPC=2⁻⁻. Because of the G-parity, the chiral-even two-quark light-cone distribution amplitudes of this tensor meson are antisymmetric under the interchange of momentum fractions of the quark and antiquark in the SU(3) limit...
The single charmed excited $\Xi_c(2930)$ state was discovered many years ago by BaBar collaboration and recently confirmed by Belle experiment. However, both of these experiments, unfortunately, could not fix the quantum numbers of this particle and its nature is under debates. In the present study we try to clarify its quantum numbers by calculati...
The strong coupling constants of negative parity heavy baryons belonging to a sextet and antitriplet representations of $SU_f(3)$ with light $\pi$ and $K$ mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only...
The vector $f_T$ and tensor couplings $f_T^\perp$ of negative parity tensor mesons $\bar{q}q$, $\bar{q}s$ and $\bar{s}s$ are calculated within the QCD sum rules method. Comparison of the results with the corresponding couplings for the positive parity tensor meson is performed.
We calculate the mass and residue of the newly observed $\Omega_c(3000)$ and $\Omega_c(3066)$ states with quantum numbers $J^P = \frac{1}{2}^{-}$ and $\frac{3}{2}^{-}$ within QCD sum rules. Our predictions on masses are in good agreement with the experimental results.
The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Δmt=mt−mt‾) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and...
Using the QCD sum rules method, we estimate the mass and residues of the first radial excitations of octet baryons. The contributions coming from the ground state baryons are eliminated by constructing the linear combinations of the sum rules corresponding to different Lorentz structures. Our predictions of the masses of the first radial excitation...
If the scale invariance exists in nature, the so-called unparticle physics may become part of reality. The only way to refute or confirm this idea is through the experiments one of which is the Large Hadron Collider (LHC). One of the peculiar properties of the unparticle stuff is that it gives striking multi-photon signals which has been studied th...
Magnetic dipole moments of the negative parity light and heavy tensor mesons are calculated within the light cone QCD sum rules method. The results are compared with the positive parity counterparts of the corresponding tensor mesons. The results of the analysis show that the magnetic dipole moments of the negative parity light mesons are smaller c...
The ground and first excited states of the decuplet baryons are studied using the two-point QCD sum rule approach. The mass and residue of these states are computed and compared with the existing experimental data and other theoretical predictions. The results for the masses of the ground state particles as well as the excited $ \Delta $ and $ \Sig...
The transition form factors responsible for the radiative and decays of the negative parity baryons are examined within light cone QCD sum rules. The decay widths of the radiative transitions are calculated using the obtained results of the form factors. A comparison of our predictions on decay widths with the corresponding widths of positive parit...
The magnetic moments of the recently observed resonance $X_b(5568)$ by DO Collaboration and its partner with charm quark are calculated in the framework of the light cone QCD sum rules, by assuming that these resonances are represented as tetra--quark states with quantum numbers $J^{PC}=1^{+\pm}$. The magnetic moment can play critical role in deter...
The strong coupling constants of the $\pi$ and $K$ mesons with negative parity octet baryons are estimated within the light cone QCD sum rules. It is observed that all strong coupling constants, similar to the case for the positive parity baryons, can be described in terms of three invariant functions, where two of them correspond to the well known...
We estimate strong coupling constant between the negative parity nucleons with $\pi$ meson within the light cone QCD sum rules. A method for eliminating the unwanted contributions coming from the nucleon--nucleon and nucleon--negative parity nucleon transition is presented. It is observed that the value strong coupling constant of the negative pari...
The Σ-Λ mixing angle is calculated in framework of the QCD sum rules by using the general form of the interpolating current. We find that our prediction for the mixing angle is (1.15 ± 0.05)0. A comparison of our result with the predictions of the quark model, chiral perturbation theory, and lattice QCD approach, and also with the results of the QC...
The transition form factors responsible for the radiative $\Sigma_Q \to \Lambda_Q \gamma$ and $\Xi_Q^\prime \to \Xi \gamma$ decays of the negative parity baryons are examined within light cone QCD sum rules. The decay widths of the radiative transitions are calculated using the obtained results of the form factors.
The light cone sum rules method is used in studying the radiative decays ΣQ→ΛQγ and ΞQ′→ΞQγ. First, the sum rules for the form factor F2(Q2=0) responsible for these transitions is constructed. Using this result, the decay widths of the above-mentioned decays are calculated and analyzed. A comparison of our predictions on the decay widths of conside...
Magnetic moments of the positive parity 70-plet baryons are estimated in the framework of the nonrelativistic quark model and QCD sum rules method. It is found that the magnetic moments of the 70-plet baryons can be expressed in terms of the
F
and
D
couplings and exhibit unitary symmetry. The QCD sum rules for the magnetic moments of the 70-plet oc...
The magnetic moment of the Lambda -> E transition between negative parity baryons is calculated in framework of the QCD sum rules approach by using the general form of the interpolating currents. The pollution arising from the positive-to-positive, and positive-to-negative parity baryons is eliminated by constructing the sum rules for different Lor...
The $\Sigma$--$\Lambda$ mixing angle is calculated in framework of the QCD
sum rules. We find that our prediction for the mixing angle is $(1.00\pm
0.15)^0$ which is in good agreement with the quark model prediction, and
approximately two times larger than the recent lattice QCD calculations.
Strong decay constants of the heavy tensor to heavy pseudoscalar (vector) and light pseudoscalar mesons are estimated within the light cone QCD sum rules. It is observed that the values of these coupling constants show a significant dependence on the choice of the Lorentz structure. Additionally, the decay widths of these mesons are calculated and...
The magnetic moments of heavy sextet JP=12+ baryons are calculated in the framework of the light cone QCD sum rules method. Linearly independent relations among the magnetic moments of these baryons are obtained. The results for the magnetic moments of heavy baryons obtained in this work are compared with the predictions of the other approaches.
The magnetic dipole moments of the ${\cal D}_2$, and ${\cal D}_{S_2}$, ${\cal
B}_2$, and ${\cal B}_{S_2}$ heavy tensor mesons are estimated in framework of
the light cone QCD sum rules. It is observed that the magnetic dipole moments
for the charged mesons are larger than that of its neutral counterpart. It is
found that the $SU(3)$ flavor symmetry...
Diagonal and transition magnetic moments of the negative parity, spin-1/2
heavy baryons are studied in framework of the light cone QCD sum rules. By
constructing the sum rules for different Lorentz structures, the unwanted
contributions coming from negative (positive) to positive (negative) parity
transitions are removed. It is obtained that the ma...
The transition magnetic moments between negative parity, spin-1/2 heavy
baryons are studied in framework of the light cone QCD sum rules. By
constructing the sum rules for different Lorentz structures, the unwanted
contributions coming from negative (positive) to positive (negative) parity
transitions are removed. It is found that the magnetic mome...
A possible manifestation of an additional light gauge boson $A^\prime$, named
as Dark Photon, associated with a group $U(1)_{\rm B-L}$ is studied in neutrino
electron scattering experiments. The exclusion plot on the the coupling
constant $g_{\rm B-L}$ and the dark photon mass $M_{A^\prime}$ is obtained. It
is shown that contributions of interferen...
The magnetic moments of heavy sextet $J^P = {1\over 2}^+$ baryons are
calculated in framework of the light cone QCD sum rules method. Linearly
independent relations among the magnetic moments of these baryons are obtained.
The results for the magnetic moments of heavy baryons obtained in this work are
compared with the predictions of the other appr...
If the $X(3872)$ is described by the picture as a mixture of the charmonium
and molecular $D^{\ast} D$ states; $Y(3940)$ as a mixture of the $\chi_{c0}$
and $D^\ast D^\ast$ states; and $X(4260)$ as a mixture of the tetra-quark and
charmonium sates, their orthogonal combinations should also exist. We estimate
the mass and residues of the states with...
A search for new physics is performed based on events with jets and a pair of isolated, same-sign leptons. The results are obtained using a sample of proton-proton collision data collected by the CMS experiment at a centre-of-mass energy of 8 TeV at the LHC, corresponding to an integrated luminosity of 19.5 fb-1. In order to be sensitive to a wide...
We calculate the magnetic dipole and electric quadrupole moments associated
with the radiative $\Omega_{Q}^{*}\rightarrow\Omega_{Q}\gamma$ and
$\Xi_{Q}^{*}\rightarrow\Xi^{\prime}_{Q}\gamma$ transitions with $Q=b$ or $c$ in
the framework of light cone QCD sum rules. It is found that the corresponding
quadrupole moments are negligibly small while the...
The magnetic moments of the low lying, negative parity, spin-3/2 baryons, including the Λ* baryon, are calculated within the light cone QCD sum rules method. The contributions coming from the positive parity, spin-3/2 baryons, as well as from the positive and negative parity spin-1/2 baryons are eliminated by constructing combinations of various in...
The razor approach to search for R–parity conserving supersymmetric particles is described in detail. Two analyses are considered: an inclusive search for new heavy particle pairs decaying to final states with at least two jets and missing transverse energy, and a dedicated search for final states with at least one jet originating from a bottom qua...
We calculate the mass and residue of the doubly/triply heavy spin-1/2 and spin- 3/2 baryons containing two/three heavy b or c quarks in the framework of QCD sum rules. We use the most general interpolating currents in symmetric and anti-symmetric forms with respect to the exchange of heavy quarks, to calculate the two-point correlation functions de...