Study of non-standard interaction mediated by a scalar field at ESSnuSB
experiment
ESSnuSB,:,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,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. 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
arxiv（2023）
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摘要
In this paper we study non-standard interactions mediated by a scalar field
(SNSI) in the context of ESSnuSB experiment. In particular we study the
capability of ESSnuSB to put bounds on the SNSI parameters and also study the
impact of SNSI in the measurement of the leptonic CP phase δ_ CP.
Existence of SNSI modifies the neutrino mass matrix and this modification can
be expressed in terms of three diagonal real parameters (η_ee,
η_μμ and η_ττ) and three off-diagonal complex
parameters (η_e μ, η_eτ and η_μτ). Our study
shows that the upper bounds on the parameters η_μμ,
η_ττ and η_μτ depend upon how Δ m^2_31 is
minimized in the theory. However, this is not the case when one tries to
measure the impact of SNSI on δ_ CP. Further, we show that the CP
sensitivity of ESSnuSB can be completely lost for certain values of η_ee
and η_μτ for which the appearance channel probability becomes
independent of δ_ CP.
