Determination of the muon charge sign with the dipolar spectrometers of the OPERA experiment
N. Agafonova
,
Alexander Aleksandrov
,
A. Anokhina
,
A. Ariga
,
T. Ariga
,
D. Bender
,
A. Bertolin
,
C. Bozza
,
R. Brugnera
,
A. Buonaura
,
S. Buontempo
,
B. Büttner
,
M. Chernyavsky
,
A. Chukanov
,
L. Consiglio
,
N. d'Ambrosio
,
G. de Lellis
,
M. de Serio
,
P. del Amo Sanchez
(1)
,
A. Di Crescenzo
,
D. Di Ferdinando
,
N. Di Marco
,
S. Dmitrievski
,
M. Dracos
(2)
,
D. Duchesneau
(1)
,
S. Dusini
,
T. Dzhatdoev
,
J. Ebert
,
A. Ereditato
,
R. A. Fini
,
T. Fukuda
,
G. Galati
,
A. Garfagnini
,
G. Giacomelli
,
C. Goellnitz
,
J. Goldberg
,
D. Goloubkov
,
Y. Gornushkin
,
G. Grella
,
M. Guler
,
C. Gustavino
,
C. Hagner
,
T. Hara
,
A. Hollnagel
,
B. Hosseini
,
H. Ishida
,
K. Ishiguro
,
K. Jakovcic
,
C. Jollet
(2)
,
C. Kamiscioglu
,
M. Kamiscioglu
,
J. Kawada
,
J. H. Kim
,
S. H. Kim
,
N. Kitagawa
,
B. Klicek
,
K. Kodama
,
M. Komatsu
,
U. Kose
,
I. Kreslo
,
A. Lauria
,
J. Lenkeit
,
A. Ljubicic
,
A. Longhin
,
P. Loverre
,
A. Malgin
,
M. Malenica
,
G. Mandrioli
,
T. Matsuo
,
V. Matveev
,
N. Mauri
,
E. Medinaceli
,
A. Meregaglia
(2)
,
M. Meyer
,
S. Mikado
,
P. Monacelli
,
M. C. Montesi
,
K. Morishima
,
M. T. Muciaccia
,
N. Naganawa
,
T. Naka
,
M. Nakamura
,
T. Nakano
,
Y. Nakatsuka
,
K. Niwa
,
S. Ogawa
,
N. Okateva
,
A. Olshevsky
,
T. Omura
,
K. Ozaki
,
A. Paoloni
,
B. D. Park
,
I. G. Park
,
L. Pasqualini
,
A. Pastore
,
L. Patrizii
,
H. Pessard
(1)
,
C. Pistillo
,
D. Podgrudkov
,
N. Polukhina
,
M. Pozzato
,
F. Pupilli
,
M. Roda
,
H. Rokujo
,
T. Roganova
,
G. Rosa
,
I. Rostovtseva
,
O. Ryazhskaya
,
O. Sato
,
Y. Sato
,
A. Schembri
,
I. Shakiryanova
,
T. Shchedrina
,
A. Sheshukov
,
H. Shibuya
,
T. Shiraishi
,
G. Shoziyoev
,
S. Simone
,
M. Sioli
,
C. Sirignano
,
G. Sirri
,
M. Spinetti
,
L. Stanco
,
N. Starkov
,
S. M. Stellacci
,
M. Stipcevic
,
P. Strolin
,
S. Takahashi
,
M. Tenti
,
F. Terranova
,
V. Tioukov
,
S. Tufanli
,
P. Vilain
,
M. Vladimirov
,
L. Votano
,
J. L. Vuilleumier
,
G. Wilquet
,
B. Wonsak
,
C. S. Yoon
,
Y. Zaitsev
,
S. Zemskova
,
A. Zghiche
(1)
N. Agafonova
- Function : Author
Alexander Aleksandrov
- Function : Author
- PersonId : 795454
- ORCID : 0000-0001-7186-7996
A. Anokhina
- Function : Author
A. Ariga
- Function : Author
T. Ariga
- Function : Author
D. Bender
- Function : Author
A. Bertolin
- Function : Author
C. Bozza
- Function : Author
R. Brugnera
- Function : Author
A. Buonaura
- Function : Author
S. Buontempo
- Function : Author
B. Büttner
- Function : Author
M. Chernyavsky
- Function : Author
A. Chukanov
- Function : Author
L. Consiglio
- Function : Author
N. d'Ambrosio
- Function : Author
G. de Lellis
- Function : Author
M. de Serio
- Function : Author
A. Di Crescenzo
- Function : Author
D. Di Ferdinando
- Function : Author
N. Di Marco
- Function : Author
S. Dmitrievski
- Function : Author
M. Dracos
- Function : Author
- PersonId : 741688
- IdHAL : marcos-dracos
- ORCID : 0000-0003-0514-193X
- IdRef : 032370806
S. Dusini
- Function : Author
T. Dzhatdoev
- Function : Author
J. Ebert
- Function : Author
A. Ereditato
- Function : Author
R. A. Fini
- Function : Author
T. Fukuda
- Function : Author
G. Galati
- Function : Author
A. Garfagnini
- Function : Author
G. Giacomelli
- Function : Author
C. Goellnitz
- Function : Author
J. Goldberg
- Function : Author
D. Goloubkov
- Function : Author
Y. Gornushkin
- Function : Author
G. Grella
- Function : Author
M. Guler
- Function : Author
C. Gustavino
- Function : Author
C. Hagner
- Function : Author
T. Hara
- Function : Author
A. Hollnagel
- Function : Author
B. Hosseini
- Function : Author
H. Ishida
- Function : Author
K. Ishiguro
- Function : Author
K. Jakovcic
- Function : Author
C. Kamiscioglu
- Function : Author
M. Kamiscioglu
- Function : Author
J. Kawada
- Function : Author
J. H. Kim
- Function : Author
S. H. Kim
- Function : Author
N. Kitagawa
- Function : Author
B. Klicek
- Function : Author
K. Kodama
- Function : Author
M. Komatsu
- Function : Author
- PersonId : 755309
- ORCID : 0000-0003-4659-8418
U. Kose
- Function : Author
I. Kreslo
- Function : Author
A. Lauria
- Function : Author
J. Lenkeit
- Function : Author
A. Ljubicic
- Function : Author
A. Longhin
- Function : Author
P. Loverre
- Function : Author
A. Malgin
- Function : Author
M. Malenica
- Function : Author
G. Mandrioli
- Function : Author
T. Matsuo
- Function : Author
V. Matveev
- Function : Author
N. Mauri
- Function : Author
E. Medinaceli
- Function : Author
M. Meyer
- Function : Author
S. Mikado
- Function : Author
P. Monacelli
- Function : Author
M. C. Montesi
- Function : Author
K. Morishima
- Function : Author
M. T. Muciaccia
- Function : Author
N. Naganawa
- Function : Author
T. Naka
- Function : Author
M. Nakamura
- Function : Author
T. Nakano
- Function : Author
Y. Nakatsuka
- Function : Author
K. Niwa
- Function : Author
S. Ogawa
- Function : Author
N. Okateva
- Function : Author
A. Olshevsky
- Function : Author
T. Omura
- Function : Author
K. Ozaki
- Function : Author
A. Paoloni
- Function : Author
B. D. Park
- Function : Author
I. G. Park
- Function : Author
L. Pasqualini
- Function : Author
A. Pastore
- Function : Author
L. Patrizii
- Function : Author
C. Pistillo
- Function : Author
D. Podgrudkov
- Function : Author
N. Polukhina
- Function : Author
M. Pozzato
- Function : Author
F. Pupilli
- Function : Author
M. Roda
- Function : Author
H. Rokujo
- Function : Author
T. Roganova
- Function : Author
G. Rosa
- Function : Author
I. Rostovtseva
- Function : Author
O. Ryazhskaya
- Function : Author
O. Sato
- Function : Author
Y. Sato
- Function : Author
- PersonId : 755299
- ORCID : 0000-0002-6857-3783
A. Schembri
- Function : Author
I. Shakiryanova
- Function : Author
T. Shchedrina
- Function : Author
A. Sheshukov
- Function : Author
H. Shibuya
- Function : Author
T. Shiraishi
- Function : Author
G. Shoziyoev
- Function : Author
S. Simone
- Function : Author
M. Sioli
- Function : Author
C. Sirignano
- Function : Author
G. Sirri
- Function : Author
M. Spinetti
- Function : Author
L. Stanco
- Function : Author
N. Starkov
- Function : Author
S. M. Stellacci
- Function : Author
M. Stipcevic
- Function : Author
P. Strolin
- Function : Author
S. Takahashi
- Function : Author
M. Tenti
- Function : Author
F. Terranova
- Function : Author
V. Tioukov
- Function : Author
S. Tufanli
- Function : Author
P. Vilain
- Function : Author
M. Vladimirov
- Function : Author
L. Votano
- Function : Author
J. L. Vuilleumier
- Function : Author
G. Wilquet
- Function : Author
B. Wonsak
- Function : Author
C. S. Yoon
- Function : Author
Y. Zaitsev
- Function : Author
S. Zemskova
- Function : Author
Abstract
The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of ντ in the CNGS νμ beam. Two large muon magnetic spectrometers are used to identify muons produced in the τ leptonic decay and in νμ CC interactions by measuring their charge and momentum. Besides the kinematic analysis of the τ decays, background resulting from the decay of charmed particles produced in νμ CC interactions is reduced by efficiently identifying the muon track. A new method for the charge sign determination has been applied, via a weighted angular matching of the straight track-segments reconstructed in the different parts of the dipole magnets. Results obtained for Monte Carlo and real data are presented. Comparison with a method where no matching is used shows a significant reduction of up to 40% of the fraction of wrongly determined charges.