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First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND

Publication ,  Journal Article
Abe, S; Asami, S; Eizuka, M; Futagi, S; Gando, A; Gando, Y; Gima, T; Goto, A; Hachiya, T; Hata, K; Ichimura, K; Ieki, S; Ikeda, H; Inoue, K ...
Published in: Physical Review D
April 1, 2023

We report a measurement of the strange axial coupling constant gAs using atmospheric neutrino data at KamLAND. This constant is a component of the axial form factor of the neutral-current quasielastic (NCQE) interaction. The value of gAs significantly changes the ratio of proton and neutron NCQE cross sections. KamLAND is suitable for measuring NCQE interactions as it can detect nucleon recoils with low-energy thresholds and measure neutron multiplicity with high efficiency. KamLAND data, including the information on neutron multiplicity associated with the NCQE interactions, makes it possible to measure gAs with a suppressed dependence on the axial mass MA, which has not yet been determined. For a comprehensive prediction of the neutron emission associated with neutrino interactions, we establish a simulation of particle emission via nuclear deexcitation of C12, a process not considered in existing neutrino Monte Carlo event generators. Energy spectrum fitting for each neutron multiplicity gives gAs=-0.14-0.26+0.25, which is the most stringent limit obtained using NCQE interactions without MA constraints. The two-body current contribution considered in this analysis relies on a theoretically effective model and electron scattering experiments and requires future verification by direct measurements and future model improvement.

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Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

April 1, 2023

Volume

107

Issue

7
 

Citation

APA
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Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., … O’Donnell, T. (2023). First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND. Physical Review D, 107(7). https://doi.org/10.1103/PhysRevD.107.072006
Abe, S., S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, et al. “First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND.” Physical Review D 107, no. 7 (April 1, 2023). https://doi.org/10.1103/PhysRevD.107.072006.
Abe S, Asami S, Eizuka M, Futagi S, Gando A, Gando Y, et al. First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND. Physical Review D. 2023 Apr 1;107(7).
Abe, S., et al. “First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND.” Physical Review D, vol. 107, no. 7, Apr. 2023. Scopus, doi:10.1103/PhysRevD.107.072006.
Abe S, Asami S, Eizuka M, Futagi S, Gando A, Gando Y, Gima T, Goto A, Hachiya T, Hata K, Ichimura K, Ieki S, Ikeda H, Inoue K, Ishidoshiro K, Kamei Y, Kawada N, Kishimoto Y, Koga M, Kurasawa M, Mitsui T, Miyake H, Nakahata T, Nakamura K, Nakamura R, Ozaki H, Sakai T, Shimizu I, Shirai J, Shiraishi K, Suzuki A, Suzuki Y, Takeuchi A, Tamae K, Watanabe H, Yoshida Y, Obara S, Ichikawa AK, Yoshida S, Umehara S, Fushimi K, Kotera K, Urano Y, Berger BE, Fujikawa BK, Learned JG, Maricic J, Axani SN, Fu Z, Smolsky J, Winslow LA, Efremenko Y, Karwowski HJ, Markoff DM, Tornow W, Detwiler JA, Enomoto S, Decowski MP, Grant C, Li A, Song H, Dell’oro S, O’Donnell T. First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND. Physical Review D. 2023 Apr 1;107(7).

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

April 1, 2023

Volume

107

Issue

7