-
The MiniBooNE Collaboration,
A. A. Aguilar-Arevalo,
B. C. Brown,
L. Bugel,
G. Cheng,
E. D. Church,
J. M. Conrad,
R. Dharmapalan,
Z. Djurcic,
D. A. Finley, [......],
A. D. Russell,
M. H. Shaevitz,
J. Spitz,
I. Stancu,
R. Tayloe,
R. G. Van de Water,
D. H. White,
D. A. Wickremasinghe,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The MiniBooNE experiment at Fermilab reports results from an analysis of
$\bar \nu_e$ appearance data from $11.27 \times 10^{20}$ protons on target in
antineutrino mode, an increase of approximately a factor of two over the
previously reported results. An event excess of $78.4 \pm 28.5$ events ($2.8
\sigma$) is observed in the energy range $200<E_\nu^{QE}<1250$ MeV. If
interpreted in a two-neutrino oscillation model,
$\bar{\nu}_{\mu}\rightarrow\bar{\nu}_e$, the best oscillation fit to the excess
has a probability of 66% while the background-only fit has a
$\chi^2$-probability of 0.5% relative to the best fit. The data are consistent
with antineutrino oscillations in the $0.01 < \Delta m^2 < 1.0$ eV$^2$ range
and have some overlap with the evidence for antineutrino oscillations from the
Liquid Scintillator Neutrino Detector (LSND). All of the major backgrounds are
constrained by in-situ event measurements so non-oscillation explanations would
need to invoke new anomalous background processes. The neutrino mode running
also shows an excess at low energy of $162.0 \pm 47.8$ events ($3.4 \sigma$)
but the energy distribution of the excess is marginally compatible with a
simple two neutrino oscillation formalism. Expanded models with several sterile
neutrinos can reduce the incompatibility by allowing for CP violating effects
between neutrino and antineutrino oscillations.
03/2013;
-
A. A. Aguilar-Arevalo,
B. C. Brown,
L. Bugel,
G. Cheng,
E. D. Church,
J. M. Conrad,
R. Dharmapalan,
Z. Djurcic,
D. A. Finley,
R. Ford, [......],
A. D. Russell,
M. H. Shaevitz,
J. Spitz,
I. Stancu,
R. Tayloe,
R. G. Van de Water,
D. H. White,
D. A. Wickremasinghe,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The largest sample ever recorded of $\numub$ charged-current quasi-elastic
(CCQE, $\numub + p \to \mup + n$) candidate events is used to produce the
minimally model-dependent, flux-integrated double-differential cross section
$\frac{d^{2}\sigma}{dT_\mu d\uz}$ for $\numub$ incident on mineral oil. This
measurement exploits the unprecedented statistics of the MiniBooNE
anti-neutrino mode sample and provides the most complete information of this
process to date. Also given to facilitate historical comparisons are the
flux-unfolded total cross section $\sigma(E_\nu)$ and single-differential cross
section $\frac{d\sigma}{d\qsq}$ on both mineral oil and on carbon by
subtracting the $\numub$ CCQE events on hydrogen. The observed cross section is
somewhat higher than the predicted cross section from a model assuming
independently-acting nucleons in carbon with canonical form factor values. The
shape of the data are also discrepant with this model. These results have
implications for intra-nuclear processes and can help constrain signal and
background processes for future neutrino oscillation measurements.
01/2013;
-
A. A. Aguilar-Arevalo,
B. Batell,
R. Cooper,
P. deNiverville,
R. Dharmapalan,
Z. Djurcic,
R. Ford,
F. G. Garcia,
G. T. Garvey,
J. Grange, [......],
Z. Pavlovic,
D. Perevalov,
C. C. Polly,
M. Pospelov,
H. Ray,
A. Ritz, B. P. Roe,
I. Stancu,
R. Tayloe R. Van de Water,
D. A. Wickremasinghe
[show abstract]
[hide abstract]
ABSTRACT: A proposal submitted to the FNAL PAC is described to search for light sub-GeV
WIMP dark matter at MiniBooNE. The possibility to steer the beam past the
target and into an absorber leads to a significant reduction in neutrino
background, allowing for a sensitive search for elastic scattering of WIMPs off
nucleons or electrons in the detector. Dark matter models involving a vector
mediator can be probed in a parameter region consistent with the required
thermal relic density, and which overlaps the region in which these models can
resolve the muon g-2 discrepancy. Estimates of signal significance are
presented for various operational modes and parameter points. The experimental
approach outlined for applying MiniBooNE to a light WIMP search may also be
applicable to other neutrino facilities.
11/2012;
-
A. A. Aguilar-Arevalo,
B. C. Brown,
L. Bugel,
R. Cooper,
J. M. Conrad,
R. Dharmapalan,
R. Ford,
Z. Djurcic,
F. G. Garcia,
G. T. Garvey, [......],
D. Perevalov,
C. C. Polly,
H. Ray, B. P. Roe,
M. H. Shaevitz,
I. Stancu R. Tayloe,
M. Tzanov,
R. Van de Water,
D. H. White,
A. Wickremasinghe
[show abstract]
[hide abstract]
ABSTRACT: We propose adding 300 mg/l PPO to the existing MiniBooNE detector mineral oil
to increase the scintillation response. This will allow the detection of
associated neutrons and increase sensitivity to final-state nucleons in
neutrino interactions. This increased capability will enable an independent
test of whether the current excess seen in the MiniBooNE oscillation search is
signal or background. In addition it will enable other neutrino interaction
measurements to be made including a search for the strange-quark contribution
to the nucleon spin Delta s and a low-energy measurement of charged-current
quasielastic scattering.
10/2012;
-
G. Cheng,
W. Huelsnitz,
A. A. Aguilar-Arevalo,
J. L. Alcaraz-Aunion,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Catala-Perez,
E. D. Church,
J. M. Conrad, [......],
Y. Uchida,
R. G. Van de Water,
J. J. Walding,
M. O. Wascko,
D. H. White,
H. B. White,
D. A. Wickremasinghe,
M. Yokoyama,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The MiniBooNE and SciBooNE collaborations report the results of a joint search for short baseline disappearance of ν̅ μ at Fermilab’s Booster Neutrino Beamline. The MiniBooNE Cherenkov detector and the SciBooNE tracking detector observe antineutrinos from the same beam, therefore the combined analysis of their data sets serves to partially constrain some of the flux and cross section uncertainties. Uncertainties in the νμ background were constrained by neutrino flux and cross section measurements performed in both detectors. A likelihood ratio method was used to set a 90% confidence level upper limit on ν̅ μ disappearance that dramatically improves upon prior limits in the Δm2=0.1–100 eV2 region.
Phys. Rev. D. 09/2012; 86(5).
-
MiniBooNE Collaboration,
SciBooNE Collaboration,
G. Cheng,
W. Huelsnitz,
A. A. Aguilar-Arevalo,
J. L. Alcaraz-Aunion,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Catala-Perez, [......],
Y. Uchida,
R. G. Van de Water,
J. J. Walding,
M. O. Wascko,
D. H. White,
H. B. White,
D. A. Wickremasinghe,
M. Yokoyama,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The MiniBooNE and SciBooNE collaborations report the results of a joint
search for short baseline disappearance of \bar{{\nu}_{\mu}} at Fermilab's
Booster Neutrino Beamline. The MiniBooNE Cherenkov detector and the SciBooNE
tracking detector observe antineutrinos from the same beam, therefore the
combined analysis of their datasets serves to partially constrain some of the
flux and cross section uncertainties. Uncertainties in the {\nu}_{\mu}
background were constrained by neutrino flux and cross section measurements
performed in both detectors. A likelihood ratio method was used to set a 90%
confidence level upper limit on \bar{{\nu}_{\mu}} disappearance that
dramatically improves upon prior limits in the {\Delta}m^2=0.1-100 eV^2 region.
08/2012;
-
MiniBooNE Collaboration,
A. A. Aguilar-Arevalo,
B. C. Brown,
L. Bugel,
G. Cheng,
E. D. Church,
J. M. Conrad,
R. Dharmapalan,
Z. Djurcic,
D. A. Finley, [......],
A. D. Russell,
M. H. Shaevitz,
J. Spitz,
I. Stancu,
R. Tayloe,
R. G. Van de Water,
D. H. White,
D. A. Wickremasinghe,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The MiniBooNE experiment at Fermilab reports results from an analysis of the
combined $\nu_e$ and $\bar \nu_e$ appearance data from $6.46 \times 10^{20}$
protons on target in neutrino mode and $11.27 \times 10^{20}$ protons on target
in antineutrino mode. A total excess of $240.3 \pm 34.5 \pm 52.6$ events ($3.8
\sigma$) is observed from combining the two data sets in the energy range
$200<E_\nu^{QE}<1250$ MeV. In a combined fit for CP-conserving $\nu_\mu
\rightarrow \nu_e$ and $\bar{\nu}_{\mu}\rightarrow\bar{\nu}_e$ oscillations via
a two-neutrino model, the background-only fit has a $\chi^2$-probability of
0.03% relative to the best oscillation fit. The data are consistent with
neutrino oscillations in the $0.01 < \Delta m^2 < 1.0$ eV$^2$ range and with
the evidence for antineutrino oscillations from the Liquid Scintillator
Neutrino Detector (LSND).
07/2012;
-
S. Schael,
R. Barate,
R. Brunelière,
I. De Bonis,
D. Decamp,
C. Goy,
S. Jézéquel,
J.-P. Lees,
F. Martin,
E. Merle, [......],
G.W. Wilson,
J.A. Wilson,
T.R. Wyatt,
S. Yamashita,
D. Zer-Zion,
L. Zivkovic,
S. Heinemeyer,
A. Pilaftsis,
G. Weiglein,
The LEP Working Group for Higgs Boson Searches
[show abstract]
[hide abstract]
ABSTRACT: The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by
the Minimal Supersymmetric standard model (MSSM). The data of the four collaborations are statistically combined and examined
for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no
significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper
bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number
of “benchmark” models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large
exclusions in the MSSM parameter space. Absolute limits are set on the parameter cosβ and, in some scenarios, on the masses
of neutral Higgs bosons.
European Physical Journal C 04/2012; 47(3):547-587. · 3.63 Impact Factor
-
The Collaboration,
P. Achard,
O. Adriani,
M. Aguilar-Benitez,
J. Alcaraz,
G. Alemanni,
J. Allaby,
A. Aloisio,
M. G. Alviggi,
H. Anderhub, [......],
An. Zalite,
Yu. Zalite,
Z. P. Zhang,
J. Zhao,
G. Y. Zhu,
R. Y. Zhu,
H. L. Zhuang,
A. Zichichi,
B. Zimmermann,
M. Zöller
[show abstract]
[hide abstract]
ABSTRACT: Bose–Einstein correlations of pairs of identical charged pions produced in hadronic Z decays are analyzed in terms of various
parametrizations. A good description is achieved using a Lévy stable distribution in conjunction with a model where a particle’s
momentum is correlated with its space–time point of production, the τ-model. Using this description and the measured rapidity and transverse momentum distributions, the space–time evolution of
particle emission in two-jet events is reconstructed. However, the elongation of the particle emission region previously observed
is not accommodated in the τ-model, and this is investigated using an adhoc modification.
European Physical Journal C 04/2012; 71(5):1-25. · 3.63 Impact Factor
-
K. B. M. Mahn,
Y. Nakajima,
A. A. Aguilar-Arevalo,
J. L. Alcaraz-Aunion,
C. E. Anderson,
A. O. Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Cao, [......],
R. Van de Water,
J. J. Walding,
M. O. Wascko,
D. H. White,
H. B. White,
M. J. Wilking,
M. Yokoyama,
H. J. Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The SciBooNE and MiniBooNE collaborations report the results of a νμ disappearance search in the Δm2 region of 0.5–40 eV2. The neutrino rate as measured by the SciBooNE tracking detectors is used to constrain the rate at the MiniBooNE Cherenkov detector in the first joint analysis of data from both collaborations. Two separate analyses of the combined data samples set 90% confidence level (CL) limits on νμ disappearance in the 0.5–40 eV2 Δm2 region, with an improvement over previous experimental constraints between 10 and 30 eV2.
Phys. Rev. D. 02/2012; 85(3).
-
The MiniBooNE Collaboration,
A. A. Aguilar-Arevalo,
C. E. Anderson,
A. O. Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Cao,
L. Coney,
J. M. Conrad, [......],
H. A. Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H. J. Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The sidereal time dependence of MiniBooNE electron neutrino and anti-electron
neutrino appearance data are analyzed to search for evidence of Lorentz and CPT
violation. An unbinned Kolmogorov-Smirnov test shows both the electron neutrino
and anti-electron neutrino appearance data are compatible with the null
sidereal variation hypothesis to more than 5%. Using an unbinned likelihood fit
with a Lorentz-violating oscillation model derived from the Standard Model
Extension (SME) to describe any excess events over background, we find that the
electron neutrino appearance data prefer a sidereal time-independent solution,
and the anti-electron neutrino appearance data slightly prefer a sidereal
time-dependent solution. Limits of order 10E-20 GeV are placed on combinations
of SME coefficients. These limits give the best limits on certain SME
coefficients for muon neutrino to electron neutrino and anti-muon neutrino to
anti-electron neutrino oscillations. The fit values and limits of combinations
of SME coefficients are provided.
09/2011;
-
MiniBooNE,
SciBooNE Collaborations: K. B. M. Mahn,
Y. Nakajima,
A. A. Aguilar-Arevalo,
J. L. Alcaraz-Aunion,
C. E. Anderson,
A. O. Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel, [......],
R. Van de Water,
J. J. Walding,
M. O. Wascko,
D. H. White,
H. B. White,
M. J. Wilking,
M. Yokoyama,
H. J. Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The SciBooNE and MiniBooNE collaborations report the results of a \nu_\mu
disappearance search in the \Delta m^2 region of 0.5-40 eV^2. The neutrino rate
as measured by the SciBooNE tracking detectors is used to constrain the rate at
the MiniBooNE Cherenkov detector in the first joint analysis of data from both
collaborations. Two separate analyses of the combined data samples set 90%
confidence level (CL) limits on \nu_\mu disappearance in the 0.5-40 eV^2 \Delta
m^2 region, with an improvement over previous experimental constraints between
10 and 30 eV^2.
06/2011;
-
A. A. Aguilar-Arevalo,
C. E. Anderson,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. M. Conrad,
R. Dharmapalan,
Z. Djurcic,
B. T. Fleming,
R. Ford, [......],
I. Stancu,
R. J. Stefanski,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: Two independent methods are employed to measure the neutrino flux of the
anti-neutrino-mode beam observed by the MiniBooNE detector. The first method
compares data to simulated event rates in a high purity $\numu$ induced
charged-current single $\pip$ (CC1$\pip$) sample while the second exploits the
difference between the angular distributions of muons created in $\numu$ and
$\numub$ charged-current quasi-elastic (CCQE) interactions. The results from
both analyses indicate the prediction of the neutrino flux component of the
pre-dominately anti-neutrino beam is over-estimated - the CC1$\pip$ analysis
indicates the predicted $\numu$ flux should be scaled by $0.76 \pm 0.11$, while
the CCQE angular fit yields $0.65 \pm 0.23$. The energy spectrum of the flux
prediction is checked by repeating the analyses in bins of reconstructed
neutrino energy, and the results show that the spectral shape is well modeled.
These analyses are a demonstration of techniques for measuring the neutrino
contamination of anti-neutrino beams observed by future non-magnetized
detectors.
02/2011;
-
A. A. Aguilar-Arevalo,
C. E. Anderson,
A. O. Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Cao,
L. Coney,
J. M. Conrad,
D. C. Cox, [......],
H. A. Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H. J. Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: We report a measurement of the flux-averaged neutral-current elastic differential cross section for neutrinos scattering on mineral oil (CH2) as a function of four-momentum transferred squared, Q2. It is obtained by measuring the kinematics of recoiling nucleons with kinetic energy greater than 50 MeV which are readily detected in MiniBooNE. This differential cross-section distribution is fit with fixed nucleon form factors apart from an axial mass MA that provides a best fit for MA=1.39±0.11 GeV. Using the data from the charged-current neutrino interaction sample, a ratio of neutral-current to charged-current quasielastic cross sections as a function of Q2 has been measured. Additionally, single protons with kinetic energies above 350 MeV can be distinguished from neutrons and multiple nucleon events. Using this marker, the strange quark contribution to the neutral-current axial vector form factor at Q2=0, Δs, is found to be Δs=0.08±0.26.
Phys. Rev. D. 11/2010; 82(9).
-
A. A. Aguilar-Arevalo,
C. E. Anderson,
A O Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J Cao,
L. Coney,
J. M. Conrad,
D. C. Cox, [......],
H A Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H J Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: Using a high-statistics, high-purity sample of $\nu_\mu$-induced charged
current, charged pion events in mineral oil (CH$_2$), MiniBooNE reports a
collection of interaction cross sections for this process. This includes
measurements of the CC$\pi^+$ cross section as a function of neutrino energy,
as well as flux-averaged single- and double-differential cross sections of the
energy and direction of both the final-state muon and pion. In addition, each
of the single-differential cross sections are extracted as a function of
neutrino energy to decouple the shape of the MiniBooNE energy spectrum from the
results. In many cases, these cross sections are the first time such quantities
have been measured on a nuclear target and in the 1 GeV energy range.
11/2010;
-
A. A. Aguilar-Arevalo,
C. E. Anderson,
A O Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J Cao,
L. Coney,
J. M. Conrad,
D. C. Cox, [......],
H A Tanaka,
R. Tayloe,
M. Tzanov,
R. G. VandeWater,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H J Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: Using a custom 3 \v{C}erenkov-ring fitter, we report cross sections for
$\nu_\mu$-induced charged-current single $\pi^0$ production on mineral oil
(\chtwo) from a sample of 5810 candidate events with 57% signal purity over an
energy range of $0.5-2.0$GeV. This includes measurements of the absolute total
cross section as a function of neutrino energy, and flux-averaged differential
cross sections measured in terms of $Q^2$, $\mu^-$ kinematics, and $\pi^0$
kinematics. The sample yields a flux-averaged total cross section of
$(9.2\pm0.3_{stat.}\pm1.5_{syst.})\times10^{-39}$cm$^2$/CH$_2$ at mean neutrino
energy of 0.965GeV.
10/2010;
-
A A Aguilar-Arevalo,
C E Anderson,
S J Brice,
B C Brown,
L Bugel,
J M Conrad,
R Dharmapalan,
Z Djurcic,
B T Fleming,
R Ford, [......],
I Stancu,
R J Stefanski,
R Tayloe,
M Tzanov,
R G Van de Water,
M O Wascko,
D H White,
M J Wilking,
G P Zeller,
E D Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: The MiniBooNE experiment at Fermilab reports results from a search for ¯ν_{μ}→¯ν_{e} oscillations, using a data sample corresponding to 5.66×10²⁰ protons on target. An excess of 20.9±14.0 events is observed in the energy range 475<E_{ν}^{QE}<1250 MeV, which, when constrained by the observed ¯ν_{μ} events, has a probability for consistency with the background-only hypothesis of 0.5%. On the other hand, fitting for ¯ν_{μ}→¯ν_{e} oscillations, the best-fit point has a χ² probability of 8.7%. The data are consistent with ¯ν_{μ}→¯ν_{e} oscillations in the 0.1 to 1.0 eV² Δm² range and with the evidence for antineutrino oscillations from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.
Physical Review Letters 10/2010; 105(18):181801. · 7.37 Impact Factor
-
MiniBooNE Collaboration,
A. A. Aguilar-Arevalo,
C. E. Anderson,
A O Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J Cao,
L. Coney,
J. M. Conrad, [......],
H A Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H J Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: A high-statistics sample of charged-current muon neutrino scattering events collected with the MiniBooNE experiment is analyzed to extract the first measurement of the double differential cross section ($\frac{d^2\sigma}{dT_\mu d\cos\theta_\mu}$) for charged-current quasielastic (CCQE) scattering on carbon. This result features minimal model dependence and provides the most complete information on this process to date. With the assumption of CCQE scattering, the absolute cross section as a function of neutrino energy ($\sigma[E_\nu]$) and the single differential cross section ($\frac{d\sigma}{dQ^2}$) are extracted to facilitate comparison with previous measurements. These quantities may be used to characterize an effective axial-vector form factor of the nucleon and to improve the modeling of low-energy neutrino interactions on nuclear targets. The results are relevant for experiments searching for neutrino oscillations. Comment: 22 pages, 16 figures, published in Physical Review D, latest version to reflect changes in PRD editing
02/2010;
-
A. A. Aguilar-Arevalo,
C. E. Anderson,
A. O. Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J. Cao,
L. Coney,
J. M. Conrad,
D. C. Cox, [......],
H. A. Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H. J. Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: We present a search for core-collapse supernovae in the Milky Way galaxy, using the MiniBooNE neutrino detector. No evidence is found for core-collapse supernovae occurring in our Galaxy in the period from December 14, 2004 to July 31, 2008, corresponding to 98% live time for collection. We set a limit on the core-collapse supernova rate out to a distance of 13.4 kpc to be less than 0.69 supernovae per year at 90% C.L.
Phys. Rev. D. 02/2010; 81(3).
-
The MiniBooNE Collaboration,
A. A. Aguilar-Arevalo,
C. E. Anderson,
A O Bazarko,
S. J. Brice,
B. C. Brown,
L. Bugel,
J Cao,
L. Coney,
J. M. Conrad, [......],
H A Tanaka,
R. Tayloe,
M. Tzanov,
R. G. Van de Water,
M. O. Wascko,
D. H. White,
M. J. Wilking,
H J Yang,
G. P. Zeller,
E. D. Zimmerman
[show abstract]
[hide abstract]
ABSTRACT: MiniBooNE reports the first absolute cross sections for neutral current single \pi^0 production on CH_2 induced by neutrino and antineutrino interactions measured from the largest sets of NC \pi^0 events collected to date. The principal result consists of differential cross sections measured as functions of \pi^0 momentum and \pi^0 angle averaged over the neutrino flux at MiniBooNE. We find total cross sections of (4.76+/-0.05_{stat}+/-0.76_{sys})*10^{-40} cm^2/nucleon at a mean energy of <E_\nu>=808 MeV and (1.48+/-0.05_{stat}+/-0.23_{sys})*10^{-40} cm^2/nucleon at a mean energy of <E_\nu>=664 MeV for \nu_\mu and \bar\nu_\mu induced production, respectively. In addition, we have included measurements of the neutrino and antineutrino total cross sections for incoherent exclusive NC 1\pi^0 production corrected for the effects of final state interactions to compare to prior results. Comment: 13 pages, 12 figures, 4 tables
11/2009;
