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Exploring invisible neutrino decay at ESSnuSB
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- Choubey, Sandhya (author)
- KTH,Partikel- och astropartikelfysik,The Oskar Klein Centre, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden
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- Ghosh, Manojit (author)
- KTH,Partikel- och astropartikelfysik,The Oskar Klein Centre, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden; Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bošković Institute, 10000, Zagreb, Croatia
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- Kempe, Daniel (author)
- KTH,Partikel- och astropartikelfysik,The Oskar Klein Centre, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden
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- (creator_code:org_t)
- 2021-05-17
- 2021
- English.
- In: Journal of High Energy Physics (JHEP). - : Springer Nature. - 1126-6708 .- 1029-8479. ; 2021:5
- Journal article (peer-reviewed)
Abstract
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- We explore invisible neutrino decay in which a heavy active neutrino state decays into a light sterile neutrino state and present a comparative analysis of two baseline options, 540 km and 360 km, for the ESSnuSB experimental setup. Our analysis shows that ESSnuSB can put a bound on the decay parameter τ3/m3 = 2.64 (1.68) × 10−11 s/eV for the baseline option of 360 (540) km at 3σ. The expected bound obtained for 360 km is slightly better than the corresponding one of DUNE for a charged current (CC) analysis. Furthermore, we show that the capability of ESSnuSB to discover decay, and to measure the decay parameter precisely, is better for the baseline option of 540 km than that of 360 km. Regarding effects of decay in δCP measurements, we find that in general the CP violation discovery potential is better in the presence of decay. The change in CP precision is significant if one assumes decay in data but no decay in theory.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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- ref (subject category)
- art (subject category)
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