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Study of nonstandard interactions mediated by a scalar field at the ESSnuSB experiment
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In this paper, we study scalar mediator induced nonstandard interactions (SNSIs) in the context of the ESSnuSB experiment. In particular, we study the capability of ESSnuSB to put bounds on the SNSI parameters and also study the impact of SNSIs in the measurement of the leptonic CP phase δCP. Existence of SNSIs modifies the neutrino mass matrix and this modification can be expressed in terms of three diagonal real parameters (ηee, ημμ, and ηττ) and three off-diagonal complex parameters (ηeμ, ηeτ, and ημτ). Our study shows that the upper bounds on the parameters ημμ and ηττ depend upon how Δm312 is minimized in the theory. However, this is not the case when one tries to measure the impact of SNSIs on δCP. Further, we show that the CP sensitivity of ESSnuSB can be completely lost for certain values of ηee and ημτ for which the appearance channel probability becomes independent of δCP.
Published by the American Physical Society
2024
American Physical Society (APS)
J. Aguilar
M. Anastasopoulos
E. Baussan
A. K. Bhattacharyya
A. Bignami
M. Blennow
M. Bogomilov
B. Bolling
E. Bouquerel
F. Bramati
A. Branca
W. Brorsson
G. Brunetti
I. Bustinduy
C. J. Carlile
J. Cederkall
T. W. Choi
S. Choubey
P. Christiansen
M. Collins
E. Cristaldo Morales
H. Danared
D. Dancila
J. P. A. M. de André
M. Dracos
I. Efthymiopoulos
T. Ekelöf
M. Eshraqi
G. Fanourakis
A. Farricker
E. Fasoula
T. Fukuda
N. Gazis
Th. Geralis
M. Ghosh
A. Giarnetti
G. Gokbulut
C. Hagner
L. Halić
V. T. Hariharan
K. E. Iversen
M. Jenssen
R. Johansson
E. Kasimi
A. Kayis Topaksu
B. Kildetof
B. Kliček
K. Kordas
A. Leisos
M. Lindroos
A. Longhin
C. Maiano
S. Marangoni
C. Marrelli
C. Martins
D. Meloni
M. Mezzetto
N. Milas
J. L. Muñoz
M. Oglakci
T. Ohlsson
M. Olvegård
M. Pari
D. Patrzalek
G. Petkov
Ch. Petridou
P. Poussot
A. Psallidas
F. Pupilli
D. Raikwal
D. Saiang
D. Sampsonidis
C. Schwab
F. Sordo
A. Sosa
G. Stavropoulos
M. Stipčević
R. Tarkeshian
F. Terranova
T. Tolba
E. Trachanas
R. Tsenov
A. Tsirigotis
S. E. Tzamarias
G. Vankova-Kirilova
N. Vassilopoulos
S. Vihonen
J. Wurtz
V. Zeter
O. Zormpa
Y. Zou
Title: Study of nonstandard interactions mediated by a scalar field at the ESSnuSB experiment
Description:
In this paper, we study scalar mediator induced nonstandard interactions (SNSIs) in the context of the ESSnuSB experiment.
In particular, we study the capability of ESSnuSB to put bounds on the SNSI parameters and also study the impact of SNSIs in the measurement of the leptonic CP phase δCP.
Existence of SNSIs modifies the neutrino mass matrix and this modification can be expressed in terms of three diagonal real parameters (ηee, ημμ, and ηττ) and three off-diagonal complex parameters (ηeμ, ηeτ, and ημτ).
Our study shows that the upper bounds on the parameters ημμ and ηττ depend upon how Δm312 is minimized in the theory.
However, this is not the case when one tries to measure the impact of SNSIs on δCP.
Further, we show that the CP sensitivity of ESSnuSB can be completely lost for certain values of ηee and ημτ for which the appearance channel probability becomes independent of δCP.
Published by the American Physical Society
2024.
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