-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
N. Pavel, [......],
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor,
M. Soares, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: A search for stop production in R-parity-violating supersymmetry has been performed in e+p interactions with the ZEUS detector at HERA, using an integrated luminosity of 65pb-1. At HERA, the R-parity-violating coupling λ’ allows resonant squark production, e+d®[(q)\tilde]e^+d\to\tilde{q}. Since the lowest-mass squark state in most supersymmetry models is the light stop, [(t)\tilde]\tilde{t}, this search concentrated on production of [(t)\tilde]\tilde{t}, followed either by a direct R-parity-violating decay, or by the gauge decay to b[(c)\tilde]+1b\tilde{\chi}^+_{1}. No evidence for stop production was found and limits were set on λ’131 as a function of the stop mass in the framework of the minimal supersymmetric standard model. The results have also been
interpreted in terms of constraints on the parameters of the minimal supergravity model.
European Physical Journal C 04/2012; 50(2):269-281. · 3.63 Impact Factor
-
ZEUS Collaboration,
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M. C. K. Mattingly,
P. Antonioli, [......],
W. H. Smith,
H. Wolfe,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: The production of excited charm, D
1(2420)0 and D
2*(2460)0, and charm-strange, D
s1(2536)±, mesons in ep collisions was measured with the ZEUS detector at HERA using an integrated luminosity of 126pb−1. Masses, widths and helicity parameters were determined. The measured yields were converted to the rates of c quarks hadronising as a given excited charm meson and to the ratios of the dominant D
2*(2460)0 and D
s1(2536)± branching fractions. A search for the radially excited charm meson, D
*′(2640)±, was also performed. The results are compared with those measured previously and with theoretical expectations.
European Physical Journal C 04/2012; 60(1):25-45. · 3.63 Impact Factor
-
The ZEUS Collaboration,
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M. C. K. Mattingly,
P. Antonioli, [......],
W. H. Smith,
H. Wolfe,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: Measurements of the cross sections for charged current deep inelastic scattering in e
−
p collisions with longitudinally polarised electron beams are presented. The measurements are based on a data sample with an
integrated luminosity of 175 pb−1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318GeV. The total cross section is given for positively
and negatively polarised electron beams. The differential cross-sections d
σ/dQ
2, d
σ/dx and d
σ/dy are presented for Q
2>200 GeV2. The double-differential cross-section d
2
σ/dxdQ
2 is presented in the kinematic range 280<Q
2<30 000 GeV2 and 0.015<x<0.65. The measured cross sections are compared with the predictions of the Standard Model.
European Physical Journal C 04/2012; 61(2):223-235. · 3.63 Impact Factor
-
The ZEUS Collaboration,
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M. C. K. Mattingly,
P. Antonioli, [......],
W. H. Smith,
H. Wolfe,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: Measurements of the neutral current cross sections for deep inelastic scattering in e
−
p collisions at HERA with a longitudinally polarised electron beam are presented. The single-differential cross-sections d
σ/dQ
2, d
σ/dx and d
σ/dy and the double-differential cross sections in Q
2 and x are measured in the kinematic region y<0.9 and Q
2>185 GeV
2 for both positively and negatively polarised electron beams and for each polarisation state separately. The measurements
are based on an integrated luminosity of 169.9 pb
−1 taken with the ZEUS detector in 2005 and 2006 at a centre-of-mass energy of 318 GeV. The structure functions
x[(F3)\tilde]x\tilde{F_{3}}
and xF
3
γ
Z
are determined by combining the e
−
p results presented in this paper with previously measured e
+
p neutral current data. The asymmetry parameter A
− is used to demonstrate the parity violating effects of electroweak interactions at large spacelike photon virtuality. The
measurements agree well with the predictions of the Standard Model.
European Physical Journal C 04/2012; 62(4):625-658. · 3.63 Impact Factor
-
The ZEUS Collaboration,
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M. C. K. Mattingly,
P. Antonioli, [......],
W. H. Smith,
H. Wolfe,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: The production of D
±- and D
0-mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6pb−1. The measurements cover the kinematic range 5<Q
2<1000 GeV2, 0.02<y<0.7, 1.5<p
T
D
<15 GeV and |η
D
|<1.6. Combinatorial background to the D-meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross
sections are compared with the predictions of next-to-leading-order QCD, which is found to describe the data well. Measurements
are extrapolated to the full kinematic phase space in order to obtain the open-charm contribution,
F2c[`(c)]F_{2}^{c\bar{c}}
, to the proton structure function,F
2.
European Physical Journal C 04/2012; 63(2):171-188. · 3.63 Impact Factor
-
The ZEUS Collaboration,
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M. C. K. Mattingly,
P. Antonioli, [......],
W. H. Smith,
H. Wolfe,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: Subjet distributions were measured in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 81.7pb−1. Jets were identified using the k
T
cluster algorithm in the laboratory frame. Subjets were defined as jet-like substructures identified by a reapplication of
the cluster algorithm at a smaller value of the resolution parameter ycuty_{\rm cut}. Measurements of subjet distributions for jets with exactly two subjets for ycut=0.05y_{\rm cut}=0.05 are presented as functions of observables sensitive to the pattern of parton radiation and to the colour coherence between
the initial and final states. Perturbative QCD predictions give an adequate description of the data.
European Physical Journal C 04/2012; 63(4):527-548. · 3.63 Impact Factor
-
S Chekanov,
M Derrick,
S Magill,
B Musgrave,
D Nicholass,
J Repond,
R Yoshida,
M C K Mattingly,
P Antonioli,
G Bari, [......],
W H Smith,
H Wolfe,
S Bhadra,
C D Catterall,
Y Cui,
G Hartner,
S Menary,
U Noor, J Standage,
J Whyte
[show abstract]
[hide abstract]
ABSTRACT: Inclusive K_{S};{0}K_{S};{0} production in ep collisions at the DESY ep collider HERA was studied with the ZEUS detector using an integrated luminosity of 0.5 fb;{-1}. Enhancements in the mass spectrum were observed and are attributed to the production of f_{2}(1270)/a_{2};{0}(1320), f_{2};{'}(1525) and f_{0}(1710). Masses and widths were obtained using a fit which takes into account theoretical predictions based on SU(3) symmetry arguments, and are consistent with the Particle Data Group values. The f_{0}(1710) state, which has a mass consistent with a glueball candidate, was observed with a statistical significance of 5 standard deviations. However, if this state is the same as that seen in gammagamma-->K_{S};{0}K_{S};{0}, it is unlikely to be a pure glueball state.
Physical Review Letters 09/2008; 101(11):112003. · 7.37 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
M. Jechow,
N. Pavel, [......],
H. Wolfe,
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: Diffractive photoproduction of dijets was measured with the ZEUS detector at the ep collider HERA using an integrated luminosity
of 77.2pb-1. The measurements were made in the kinematic range Q2 < 1GeV2, 0.20<y<0.85 and xIP<0.025, where Q2 is the photon virtuality, y is the inelasticity and xIP is the fraction of the proton momentum taken by the diffractive exchange. The two jets with the highest transverse energy,
ET
jet, were required to satisfy ET
jet>7.5 and 6.5GeV, respectively, and to lie in the pseudorapidity range -1.5<ηjet<1.5. Differential cross sections were compared to perturbative QCD calculations using available parameterisations of diffractive
parton distributions of the proton.
European Physical Journal C 04/2008; 55(2):177-191. · 3.63 Impact Factor
-
S. Chekanov, M. Derrick, S. Magill, B. Musgrave, D. Nicholass,
M. C. K. Mattingly,
N. Pavel M. Jechow,
S. Antonelli,
P. Antonioli,
G. Bari,
M. Basile,
L. Bellagamba,
M. Bindi,
D. Boscherini, [......],
M. Rosin,
E. Brownson, T. Danielson, A. Everett, D. Kçira, D. D. Reeder,
S. Bhadra,
C. D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte
[show abstract]
[hide abstract]
ABSTRACT: The cross section for high-ET dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8 pb-1. The events were required to have a virtuality of the incoming photon, Q2, of less than 1 GeV2 and a photon-proton center-of-mass energy in the range 142<Wγp<293 GeV. Events were selected if at least two jets satisfied the transverse-energy requirements of ETjet1>20 GeV and ETjet2>15 GeV and pseudorapidity (with respect to the proton beam direction) requirements of -1<ηjet1,2<3, with at least one of the jets satisfying -1<ηjet<2.5. The measurements show sensitivity to the parton distributions in the photon and proton and to effects beyond next-to-leading order in QCD. Hence these data can be used to constrain further the parton densities in the proton and photon.
Phys. Rev. D. 10/2007; 76(7).
-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
N. Pavel, [......],
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor,
M. Soares, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: The distribution of the azimuthal angle of charged and neutral hadrons relative to the lepton plane has been studied for neutral
current deep inelastic ep scattering using an integrated luminosity of 45pb-1 taken with the ZEUS detector. The kinematic range is 100<Q2<8000GeV2, 0.2<y<0.8 and 0.01<x<0.1 where Q2 is the virtuality of the exchanged boson, y is the inelasticity and x is the Bjorken variable. The measurements were made
in the hadronic centre-of-mass system. The analysis exploits the energy-flow method, which allows the measurement to be made
over a larger range of pseudorapidity compared to previous results. The dependence of the moments of the azimuthal distributions
on the pseudorapidity and minimum transverse energy of the final-state hadrons are presented. Although the predictions from
next-to-leading-order QCD describe the data better than do the Monte Carlo models incorporating leading-logarithm parton showers,
they still fail to describe the magnitude of the asymmetries. This suggests that higher-order calculations may be necessary
to describe these data.
European Physical Journal C 06/2007; 51(2):289-299. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
M. Jechow, [......],
H. Wolfe,
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: The production of the neutral strange hadrons K0
S, Λ and Λ̄ has been measured in ep collisions at HERA using the ZEUS detector. Cross sections, baryon-to-meson ratios, relative
yields of strange and charged light hadrons, Λ (Λ̄) asymmetry and polarization have been measured in three kinematic regions:
Q2 > 25GeV2; 5 < Q2 < 25GeV2; and in photoproduction (Q2≃0). In photoproduction the presence of two hadronic jets, each with at least 5GeV transverse energy, was required. The measurements
agree in general with Monte Carlo models and are consistent with measurements made at e+e- colliders, except for an enhancement of baryon relative to meson production in photoproduction.
European Physical Journal C 05/2007; 51(1):1-23. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
N. Pavel, [......],
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor,
M. Soares, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: The production of beauty quarks with a D*±D^{\ast\pm} and a muon in the final state has been measured with the ZEUS detector at HERA using an integrated luminosity of 114pb-1. Low transverse-momentum thresholds for the muon and D* meson allow for a measurement of beauty production closer to the production threshold than previous measurements. The beauty
signal was extracted using the charge correlations and angular distributions of the muon with respect to the D* meson. Cross sections for photoproduction and deep inelastic scattering are somewhat higher than, but compatible with, next-to-leading-order
QCD predictions, and compatible with other measurements.
European Physical Journal C 03/2007; 50(2):299-314. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
M. Jechow,
N. Pavel, [......],
H. Wolfe,
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: Diffractive photoproduction of D*±(2010) mesons was measured with the ZEUS detector at the ep collider HERA, using an integrated luminosity of 78.6pb-1. The D* mesons were reconstructed in the kinematic range: transverse momentum pT(D*) > 1.9GeV and pseudorapidity |η(D*)|<1.6, using the decay D*+→D0π+
s followed by D0→K-π+(+c.c.). Diffractive events were identified by a large gap in pseudorapidity between the produced hadronic state and the outgoing
proton. Cross sections are reported for photon–proton centre-of-mass energies in the range 130 < W < 300GeV and for photon
virtualities Q2 < 1GeV2, in two ranges of the Pomeron fractional momentum xIP<0.035 and xIP<0.01. The relative contribution of diffractive events to the inclusive D*±(2010) photoproduction cross section is about 6%. The data are in agreement with perturbative QCD calculations based on various
parameterisations of diffractive parton distribution functions. The results are consistent with diffractive QCD factorisation.
European Physical Journal C 01/2007; 51(2):301-315. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
N. Pavel, [......],
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor,
M. Soares, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: A new method is employed to measure the neutral current cross section up to Bjorken-x values of one with the ZEUS detector
at HERA using an integrated luminosity of 65.1pb-1 for e+p collisions and 16.7pb-1 for e-p collisions at Ös=318GeV\sqrt{s}=318\,\mathrm{GeV} and 38.6pb-1 for e+p collisions at Ös=300GeV\sqrt{s}=300\,\mathrm{GeV}. Cross sections have been extracted for Q2≥648GeV2 and are compared to predictions using different parton density functions. For the highest x bins, the data have a tendency
to lie above the expectations using recent parton density function parametrizations.
European Physical Journal C 12/2006; 49(2):523-544. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
S. Magill,
S. Miglioranzi,
B. Musgrave,
D. Nicholass,
J. Repond,
R. Yoshida,
M.C.K. Mattingly,
N. Pavel, [......],
S. Bhadra,
C.D. Catterall,
Y. Cui,
G. Hartner,
S. Menary,
U. Noor,
M. Soares, J. Standage,
J. Whyte,
The ZEUS Collaboration
[show abstract]
[hide abstract]
ABSTRACT: The photoproduction of prompt photons, together with an accompanying jet, has been studied in ep collisions at a centre-of-mass
energy of 318GeV with the ZEUS detector at HERA using an integrated luminosity of 77pb-1. Cross sections were measured for the transverse energy of the photon and the jet larger than 5 and 6GeV, respectively.
The differential γ+jet cross sections were reconstructed as functions of the transverse energy, pseudorapidity and xγ
obs, the fraction of the incoming photon momentum taken by the photon-jet system. Predictions based on leading-logarithm parton-shower
Monte Carlo models and next-to-leading-order (NLO) QCD generally underestimate the cross sections for the transverse energies
of prompt photons below 7GeV, while the kT-factorisation QCD calculation agrees with the data better. When the minimum transverse energy of prompt photons is increased
to 7GeV, both NLO QCD and the kT-factorisation calculations are in good agreement with the data.
European Physical Journal C 12/2006; 49(2):511-522. · 3.63 Impact Factor
-
S. Chekanov,
M. Derrick,
D. Krakauer,
J. H. Loizides,
S. Magill,
S. Miglioranzi,
B. Musgrave,
J. Repond,
R. Yoshida,
M. C. K. Mattingly, [......],
W. H. Smith,
A. Deshpande,
S. Dhawan,
S. Bhadra,
C. D. Catterall,
S. Fourletov,
G. Hartner,
S. Menary,
M. Soares, J. Standage
Physical review D: Particles and fields 08/2006; 74(5):59906.
-
S. Chekanov, M. Derrick, D. Krakauer, J. H. Loizides,
S. Miglioranzi S. Magill,
M. C. K. Mattingly,
P. Antonioli,
G. Bari,
M. Basile,
L. Bellagamba,
D. Boscherini,
A. Bruni,
G. Bruni, [......],
W. H. Smith,
A. Deshpande,
S. Dhawan,
S. Bhadra,
C. D. Catterall,
S. Fourletov,
G. Hartner,
S. Menary,
M. Soares, J. Standage
[show abstract]
[hide abstract]
ABSTRACT: The photoproduction of bottom quarks in events with two jets and a muon has been measured with the ZEUS detector at HERA using an integrated luminosity of 110 pb-1. The fraction of jets containing b quarks was extracted from the transverse momentum distribution of the muon relative to the closest jet. Differential cross sections for bottom production as a function of the transverse momentum and pseudorapidity of the muon, of the associated jet and of xγjets, the fraction of the photon’s momentum participating in the hard process, are compared with MC models and QCD predictions made at next-to-leading order. The latter give a good description of the data.
Phys. Rev. D. 07/2004; 70(1).
-
S. Chekanov, M. Derrick, D. Krakauer, J. H. Loizides,
M. C. K. Mattingly,
P. Antonioli,
G. Bari,
M. Basile,
L. Bellagamba,
D. Boscherini,
A. Bruni,
G. Bruni,
G. Cara Romeo, [......],
S. Dhawan,
V. W. Hughes,
P. B. Straub,
S. Bhadra,
C. D. Catterall,
S. Fourletov,
G. Hartner,
S. Menary,
M. Soares, J. Standage
[show abstract]
[hide abstract]
ABSTRACT: A search for narrow-width resonances that decay into electron+jet or neutrino+jet has been performed with the ZEUS detector at the DESY ep collider HERA operating at center-of-mass energies of 300 and 318 GeV. An integrated e+p luminosity of 114.8pb-1 and e-p luminosity of 16.7pb-1 were used. No evidence for any resonance was found. Limits were derived on the Yukawa coupling λ as a function of the mass of a hypothetical resonance that has arbitrary decay branching ratios into eq or νq. These limits also apply to squarks predicted by R-parity-violating supersymmetry. Limits for the production of leptoquarks described by the Buchmüller-Rückl-Wyler model were also derived for masses up to 400 GeV. For λ=0.1, leptoquark masses up to 290 GeV are excluded.
Phys. Rev. D. 09/2003; 68(5).
-
L. K. Gladilin,
D. Hochman,
U. Karshon,
J. Breitweg,
D. Chapin,
R. Cross,
D. Kcira,
S. Lammers,
D. D. Reeder,
A. A. Savin, [......],
A. Deshpande,
S. Dhawan,
V. W. Hughes,
P. B. Straub,
S. Bhadra,
C. D. Catterall,
S. Fourletov,
S. Menary,
M. Soares, J. Standage
[show abstract]
[hide abstract]
ABSTRACT: The photon-proton total cross section has been measured in the process
e+ p -> e+ gamma p -> e+ X with the ZEUS detector at HERA. Events
were collected with photon virtuality Q^2 < 0.02 GeV^2 and average
gamma-p center-of-mass energy W_{gamma p} = 209 GeV in a dedicated run,
designed to control systematic effects, with an integrated luminosity of
49 nb^{-1}. The measured total cross section is sigma_{tot}^{gamma p} =
174 +- 1 (stat.) +- 13 (syst.) microbarns. The energy dependence of the
cross section is compatible with parameterizations of high-energy p-p
and p-pbar data.
Nuclear Physics B 03/2002; 627:3-28. · 4.66 Impact Factor
-
L. K. Gladilin,
D. Hochman,
U. Karshon,
J. Breitweg,
D. Chapin,
R. Cross,
D. Kcira,
S. Lammers,
D. D. Reeder,
A. A. Savin, [......],
A. Deshpande,
S. Dhawan,
V. W. Hughes,
P. B. Straub,
S. Bhadra,
C. D. Catterall,
S. Fourletov,
S. Menary,
M. Soares, J. Standage
[show abstract]
[hide abstract]
ABSTRACT: Dijet differential cross sections for the reaction e+p -> e+ + jet +
jet + X in the photoproduction regime have been measured with the ZEUS
detector at HERA using an integrated luminosity of 42.7 pb**{-1}. The
cross sections are given for photon-proton centre-of-mass energies in
the range 134< W <277 GeV. The differential cross sections as a
function of the dijet mass, Mjj, and of the dijet angular variables have
been measured for 47 < Mjj < 160 GeV and compared to
next-to-leading-order QCD calculations. The dijet events in the region
75< Mjj < 100 GeV have been used to derive a 95% C.L. upper limit
on the cross section for Z0 photoproduction of sigma(e+ p -> e+ Z0 X}
< 5.9 pb. Upper limits on the photoproduction of new heavy resonances
decaying into two jets are also presented for masses in the range
between 60 GeV and 155 GeV.
Physics Letters B 03/2002; 531:9-27. · 3.95 Impact Factor
