Measurement of the branching fractions of the B+ →ηâ "+νâ " and B+ →η′â "+νâ " decays with signal-side only reconstruction in the full q2 range

Date Issued
01-08-2022
Author(s)
Gebauer, U.
Beleño, C.
Frey, A.
Adachi, I.
Adamczyk, K.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Aushev, T.
Ayad, R.
Babu, V.
Bahinipati, S.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bhardwaj, V.
Bhuyan, B.
Bilka, T.
Biswal, J.
Bobrov, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
Campajola, M.
Cao, L.
ÄŒervenkov, D.
Chang, M. C.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, H. E.
Cho, K.
Cho, S. J.
Choi, S. K.
Choi, Y.
Choudhury, S.
Cinabro, D.
Cunliffe, S.
Das, S.
Dash, N.
De Nardo, G.
Di Capua, F.
Dingfelder, J.
DoleŽal, Z.
Dong, T. V.
Eidelman, S.
Epifanov, D.
Ferber, T.
Ferlewicz, D.
Fulsom, B. G.
Garg, R.
Gaur, V.
Gabyshev, N.
Garmash, A.
Giri, A.
Goldenzweig, P.
Golob, B.
Gudkova, K.
Hadjivasiliou, C.
Halder, S.
Hara, T.
Hartbrich, O.
Hayasaka, K.
Hayashii, H.
Hedges, M. T.
Hou, W. S.
Hsu, C. L.
Iijima, T.
Inami, K.
Ishikawa, A.
Itoh, R.
Iwasaki, M.
Iwasaki, Y.
Jacobs, W. W.
Jia, S.
Jin, Y.
Joo, C. W.
Joo, K. K.
Kahn, J.
Kaliyar, A. B.
Kang, K. H.
Karyan, G.
Kawasaki, T.
Kichimi, H.
Kiesling, C.
Kim, C. H.
Kim, D. Y.
Kim, S. H.
Kim, Y. K.
Kinoshita, K.
Kodyš, P.
Konno, T.
Korobov, A.
Korpar, S.
Kovalenko, E.
KriŽan, P.
DOI
Abstract
The branching fractions of the decays B+→ηâ "+νâ "and B+→η′â "+νâ "are measured, where â "is either an electron or a muon, using a data sample of 711 fb-1 containing 772×106BB¯ pairs collected at the I (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-collider. To reduce the dependence of the result on the form factor model, the measurement is performed over the entire q2 range. The resulting branching fractions are B(B+→ηâ "+νâ ")=(2.83±0.55(stat.)±0.34(syst.))×10-5 and B(B+→η′â "+νâ ")=(2.79±1.29(stat.)±0.30(syst.))×10-5.
Volume
106