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Probing muonic charged current nonstandard interactions at decay-at-rest facilities in conjunction with T2HK
Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, India..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3540-6548
Inst for Basic Sci Korea, Ctr Theoret Phys Universe, Daejeon 34051, South Korea.;Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea..
Inst Math Sci, Chennai 600113, Tamil Nadu, India..
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2020 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 101, no 5, article id 055009Article in journal (Refereed) Published
Abstract [en]

The muon decay-at-rest (mu-DAR) facility provides us with an ideal platform to probe purely muonic charged-current nonstandard neutrino interactions (NSIs). We propose to probe this class of NSI effects using antineutrinos from a mu-DAR source in conjunction with neutrinos from the future Tokai to Kamioka superbeam experiment with megaton hyper Kamiokande detector (T2HK). Even though muonic NSIs are absent in neutrino production at T2HK, we show that our proposed hybrid setup comprising mu-DAR and T2HK helps in alleviating the parameter degeneracies that can arise in data. Analytic considerations reveal that the oscillation probability is most sensitive to the NSI parameter in the mu-e sector. For this parameter, we show that the mu-DAR setup can improve on the existing bounds down to around 0.01, especially when the data are combined with neutrino data from T2HK experiment due to the lifting of parameter degeneracies. The high precision with which mu-DAR can measure delta(CP) is shown to be robust even in the presence of the considered NSIs. Finally, we show that the combination of mu-DAR along with T2HK can also be used to put mild constraints on the NSI phase in the vicinity of the maximal CP-violating value, for the chosen benchmark value of epsilon(mu e)(mu e) = 0.01.

Place, publisher, year, edition, pages
American Physical Society, 2020. Vol. 101, no 5, article id 055009
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Physical Sciences
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URN: urn:nbn:se:kth:diva-271530DOI: 10.1103/PhysRevD.101.055009ISI: 000518459000002Scopus ID: 2-s2.0-85083506378OAI: oai:DiVA.org:kth-271530DiVA, id: diva2:1426623
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QC 20200427

Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2020-04-27Bibliographically approved

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