-
M G Catanesi,
M T Muciaccia,
E Radicioni,
S Simone,
R Edgecock,
M. Ellis,
S Robbins,
F J P Soler,
C Gössling,
M Mass, [......],
G Giannini,
G. Santin,
Y. Hayato,
A Ichikawa,
T Kobayashi,
J Burguet-Castell,
J J Gómez-Cadenas,
P Novella,
M. Sorel,
A Tornero
-
A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
M. Gostkin,
A. Guskov,
Z. Kroumchtein,
Y. Nefedov,
K. Nikolaev, [......],
F. Dydak,
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross sections of the production of secondary protons, charged pions, and deuterons,
in the interactions with a 5% λ
abs thick stationary tantalum target, of proton and pion beams with momentum from ±3GeV/c to ±15GeV/c. Results are given for secondary particles with production angles 20°<θ<125°. They are of particular relevance for the optimization of the design parameters of the proton driver of a neutrino factory.
European Physical Journal C 04/2012; 63(4):549-609. · 3.63 Impact Factor
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A.E. Ball,
A. Braem,
L. Camilleri,
A. Catinaccio,
G. Chelkov,
F. Dydak, A. Elagin,
P.K. Frandsen,
M. Gostkin,
A. Grant, [......],
H. Müller,
H. Postema,
M. Price,
T. Rovelli,
D. Schinzel,
J. Séguinot,
G. Valenti,
R. Voss,
J. Wotschack,
A. Zhemchugov
[show abstract]
[hide abstract]
ABSTRACT: Today’s greatest challenge in accelerator-based neutrino physics is to measure the mixing angle θ13 which is known to be much smaller than the solar mixing angle θ12 and the atmospheric mixing angle θ23. A non-zero value of the angle θ13 is a prerequisite for observing CP violation in neutrino mixing. In this paper, we discuss a deep-sea neutrino experiment
with 1.5Mt fiducial target mass in the Gulf of Taranto with the prime objective of measuring θ13. The detector is exposed to the CERN neutrino beam to Gran Sasso in off-axis geometry. Monochromatic muon neutrinos of ≈
800MeV energy are the dominant beam component. Neutrinos are detected through quasi-elastic, charged-current reactions in
sea water; electrons and muons are detected in a large-surface, ring-imaging Cherenkov detector. The profile of the seabed
in the Gulf of Taranto allows for a moveable experiment at variable distances from CERN, starting at 1100km. From the oscillatory
pattern of the disappearance of muon neutrinos, the experiment will measure sin2θ23 and especially Δm2
23 with high precision. The appearance of electron neutrinos will be observed with a sensitivity to P(νμ→νe) as small as 0.0035 (90% CL) and sin2θ13 as small as 0.0019 (90% CL; for a CP phase angle δ=0° and for normal neutrino mass hierarchy).
European Physical Journal C 04/2012; 49(4):1117-1142. · 3.63 Impact Factor
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A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
M. Gostkin,
S. Grishin,
A. Guskov,
Z. Kroumchtein,
Yu. Nefedov, [......],
F. Dydak,
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons and charged pions, in the
interactions with a 5% λ
abs thick stationary beryllium target, of proton and pion beams with momentum from ±3GeV/c to ±15GeV/c. Results are given for secondary particles with production angles 20° <θ<125°.
European Physical Journal C 04/2012; 62(4):697-754. · 3.63 Impact Factor
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A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
M. Gostkin,
A. Guskov,
Z. Kroumchtein,
Yu. Nefedov,
K. Nikolaev, [......],
F. Dydak,
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons,
in the interactions with a 5% λ
abs thick stationary copper target, of proton and pion beams with momentum from ±3GeV/c to ±15GeV/c. Results are given for secondary particles with production angles 20°<θ<125°. The inclusive pion production cross-sections are compared to those on beryllium and tantalum, published by us recently.
European Physical Journal C 04/2012; 64(2):181-241. · 3.63 Impact Factor
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The HARD-CDP Group,
A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
D. Emelyanov,
M. Gostkin,
A. Guskov,
Z. Kroumchtein, [......],
F. Dydak,
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons,
in the interactions with a 5% λ
int thick stationary carbon target, of proton and pion beams with momentum from ±3GeV/c to ±15GeV/c. Results are given for secondary particles with production angles 20°<θ<125°. Cross-sections on carbon nuclei are compared with cross-sections on beryllium, copper, tantalum and lead nuclei.
European Physical Journal C 04/2012; 70(3):573-633. · 3.63 Impact Factor
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A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
M. Gostkin,
S. Grishin,
A. Guskov,
Z. Kroumchtein,
Yu. Nefedov, [......],
F. Dydak,
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons, deuterons, and charged pions
and kaons, in the interactions with a 5% λ
abs thick stationary beryllium target, of a +8.9GeV/c proton and pion beam, and a −8.0GeV/c pion beam. Results are given for secondary particles with production angles 20○<θ<125○.
European Physical Journal C 04/2012; 62(2):293-317. · 3.63 Impact Factor
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A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Y. Nefedov, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: The alleged mistakes in recent papers that reanalyze the backgrounds to the
'LSND anomaly' do not exist. We maintain our conclusion that the significance
of the 'LSND anomaly' is not 3.8 sigma but not larger than 2.3 sigma.
12/2011;
-
A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Y. Nefedov, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: This paper, together with a preceding paper, questions the so-called 'LSND
anomaly': a 3.8 sigma excess of antielectronneutrino interactions over standard
backgrounds, observed by the LSND Collaboration in a beam dump experiment with
800 MeV protons. That excess has been interpreted as evidence for the
antimuonneutrino to antielectronneutrino oscillation in the \Deltam2 range from
0.2 eV2 to 2 eV2. Such a \Deltam2 range is incompatible with the widely
accepted model of oscillations between three light neutrino species and would
require the existence of at least one light 'sterile' neutrino. In a preceding
paper, it was concluded that the estimates of standard backgrounds must be
significantly increased. In this paper, the LSND Collaboration's estimate of
the number of antielectronneutrino interactions followed by neutron capture,
and of its error, is questioned. The overall conclusion is that the
significance of the 'LSND anomaly' is not larger than 2.3 sigma.
12/2011;
-
A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Y. Nefedov, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production
of secondary protons, charged pions, and deuterons, in the interactions with a
5% {\lambda}int thick stationary aluminium target, of proton and pion beams
with momentum from \pm3 GeV/c to \pm15 GeV/c. Results are given for secondary
particles with production angles between 20 and 125 degrees. Cross-sections on
aluminium nuclei are compared with cross-sections on beryllium, carbon, copper,
tin, tantalum and lead nuclei.
10/2011;
-
The HARP-CDP Group: A. Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Y. Nefedov, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: This paper, together with a subsequent paper, questions the so-called 'LSND
anomaly': a 3.8 {\sigma} excess of anti-electronneutrino interactions over
standard backgrounds, observed by the LSND Collaboration in a beam dump
experiment with 800 MeV protons. That excess has been interpreted as evidence
for the anti-muonneutrino{\to} anti-electronneutrino oscillation in the
{\Delta}m2 range from 0.2 eV2 to 2 eV2. Such a {\Delta}m2 range is incompatible
with the widely accepted model of oscillations between three light neutrino
species and would require the existence of at least one light 'sterile'
neutrino. In this paper, new data on pion production by protons on nuclei are
presented, and four decades old data on pion production by neutrons on nuclei
are recalled, that together increase significantly the estimates of standard
backgrounds in the LSND experiment, and decrease the significance of the 'LSND
anomaly' from 3.8 {\sigma} to 2.9 {\sigma}. In a subsequent paper, in addition
the LSND Collaboration's data analysis will be questioned, rendering a further
reduction of the significance of the 'LSND anomaly'.
10/2011;
-
The HARP-CDP Group: A. Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Y. Nefedov, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production
of secondary protons, charged pions, and deuterons, in the interactions with a
5% nuclear interaction length thick stationary tin target, of proton and pion
beams with momentum from \pm3 GeV/c to \pm15 GeV/c. Results are given for
secondary particles with production angles between 20 and 125 degrees.
Cross-sections on tin nuclei are compared with cross-sections on beryllium,
carbon, copper, tantalum and lead nuclei.
05/2011;
-
HARP-CDP Collaboration,
A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
D. Emelyanov,
M. Gostkin,
A Guskov,
Z. Kroumchtein, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Y. Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons, in the interactions with a 5% nuclear interaction length thick stationary carbon target, of proton and pion beams with momentum from \pm 3 GeV/c to \pm 15 GeV/c. Results are given for secondary particles with production angles between 20 and 125 degrees. Cross-sections on carbon nuclei are compared with cross-sections on beryllium, copper, tantalum and lead nuclei. Comment: 67 pages, 13 figures
07/2010;
-
The HARP-CDP Group: A. Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
M. Gostkin,
A Guskov,
Z. Kroumchtein,
Yu. Nefedov,
K. Nikolaev, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: The paper CERN-PH-EP-2009-015 (arXiv:0903.4762) by A. Bagulya et al. violates standards of quality of work and scientific ethics on several counts. The paper contains assertions that contradict established detector physics. The paper falls short of proving the correctness of the authors' concepts and results. The paper ignores or quotes misleadingly pertinent published work. The paper ignores the fact that the authors' concepts and results have already been shown wrong in the published literature. The authors seem unaware that cross-section results from the 'HARP Collaboration' that are based on the paper's concepts and algorithms are in gross disagreement with the results of a second analysis of the same data, and with the results of other experiments. Comment: 8 pages, 3 figures
09/2009;
-
A. Bolshakova,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
M. Gostkin,
A. Grishin,
A. Guskov,
Z. Kroumchtein,
Yu. Nefedov, [......],
J. Wotschack,
A. De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu. Sviridov,
E. Usenko,
V. Zaets,
The HARP-CDP Group
[show abstract]
[hide abstract]
ABSTRACT: Hadron generation in the Geant4 simulation tool kit is compared with inclusive spectra of secondary protons and pions from
the interactions with beryllium nuclei of +8.9GeV/c protons and pions, and of −8.0GeV/c pions. The data were taken in 2002 at the CERN Proton Synchrotron with the HARP spectrometer. We report on significant disagreements
between data and Monte Carlo simulation especially in the polar-angle distributions of secondary protons and pions.
European Physical Journal C 07/2008; 56(3):323-332. · 3.63 Impact Factor
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V. Ammosov,
I. Boyko,
G. Chelkov,
D. Dedovitch,
F. Dydak, A. Elagin,
M. Gostkin,
A. Guskov,
V. Koreshev,
Z. Kroumchtein,
Yu. Nefedov,
K. Nikolaev,
J. Wotschack,
A. Zhemchugov
[show abstract]
[hide abstract]
ABSTRACT: We argue that the cross-sections reported in the article “Measurement of the production of charged pions by protons on a tantalum
target” by M.G. Catanesi et al., published in this journal, result from invalid analysis concepts and should not be trusted.
European Physical Journal C 02/2008; 54(1):169-173. · 3.63 Impact Factor
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V Ammosov,
I Boyko,
G Chelkov,
D Dedovitch,
F Dydak, A Elagin,
V Gapienko,
M Gostkin,
A Guskov,
V Koreshev,
Z Kroumchtein,
Yu Nefedov,
K Nikolaev,
A Semak,
Yu Sviridov,
E Usenko,
J Wotschack,
V Zaets,
A Zhemchugov
[show abstract]
[hide abstract]
ABSTRACT: The HARP Collaboration recently published calibrations of their TPC and RPC detectors, and differential cross-sections of large-angle pion production in proton-nucleus collisions. We argue that these calibrations are biased and cross-sections based on them should not be trusted.
Journal of Instrumentation 01/2008; 3(01):P01002. · 1.87 Impact Factor
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F. Dydak,
V. Ammosov,
I. Boyko,
G. Chelkov,
D. Dedovitch, A. Elagin,
V. Gapienko,
M. Gostkin,
A. Guskov,
V. Koreshev,
Z. Kroumchtein,
Y. Nefedov,
K. Nikolaev,
A. Semak,
Y. Sviridov,
E. Usenko,
J. Wotschack,
V. Zaets,
A. Zhemchugov
[show abstract]
[hide abstract]
ABSTRACT: It is shown that the above cited paper reports a detector performance that is inconsistent and cannot possibly be correct. The unknown detector physics that has been invoked to explain strange findings is an artefact stemming from wrong data analysis.
IEEE Transactions on Nuclear Science 09/2007; · 1.45 Impact Factor
-
A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
M. Gostkin,
A Guskov,
Z Kroumshtein,
Yu. Nefedov,
K. Nikolaev, [......],
F Dydak,
J Wotschack,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: We report on double-differential inclusive cross-sections of the production of secondary protons, charged pions, and deuterons, in the interactions with a 5% $\lambda_{abs}$ thick stationary tantalum target, of proton and pion beams with momentum from $\pm{3} GeV/c to \pm{15} GeV/c$. Results are given for secondary particles with production angles 20° < heta < 125° . They are of particular relevance for the optimization of the design parameters of the proton driver of a neutrino factory.
-
A Bolshakova,
I Boyko,
G Chelkov,
D Dedovitch, A Elagin,
M. Gostkin,
A Guskov,
Z Krumshtein,
Yu. Nefedov,
K. Nikolaev, [......],
F Dydak,
J Wotschak,
A De Min,
V. Ammosov,
V. Gapienko,
V. Koreshev,
A. Semak,
Yu Sviridov,
E. Usenko,
V. Zaets
[show abstract]
[hide abstract]
ABSTRACT: Hadron generation in the Geant4 simulation tool kit is compared with inclusive spectra of secondary protons and pions from the interactions with beryllium nuclei of +8.9 GeV/c protons and pions, and of -8.0 GeV/c pions. The data were taken in 2002 at the CERN Proton Synchrotron with the HARP spectrometer. We report on significant disagreements between data and simulated data especially in the polar-angle distributions of secondary protons and pions.
