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Measurement of the branching fractions of the $B^+ \to η\ell^+ ν_{\ell} $ and $B^+ \to η^{\prime} \ell^+ ν_{\ell} $ decays with signal-side only reconstruction in the full $q^2$ range

Publication ,  Journal Article
Collaboration, B; Gebauer, U; Beleño, C; Frey, A; Adachi, I; Adamczyk, K; Aihara, H; Said, SA; Asner, DM; Atmacan, H; Aushev, T; Ayad, R ...
Published in: Phys. Rev. D
April 27, 2021

The branching fractions of the decays $B^{+} \to \eta \ell^{+} \nu_{\ell}$ and $B^{+} \to \eta^{\prime} \ell^{+} \nu_{\ell}$ are measured, where $\ell$ is either an electron or a muon, using a data sample of $711\,{\rm fb}^{-1}$ containing $772 \times 10^6 B\bar{B}$ pairs collected at the $\Upsilon(4S)$ 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 $q^2$ range. The resulting branching fractions are ${\cal B}(B^{+} \rightarrow \eta \ell^{+} \nu_{\ell}) = (2.83 \pm 0.55_{\rm (stat.)} \pm 0.34_{\rm (syst.)}) \times 10^{-5}$ and ${\cal B}(B^{+} \rightarrow \eta' \ell^{+} \nu_{\ell}) = (2.79 \pm 1.29_{\rm (stat.)} \pm 0.30_{\rm (syst.)}) \times 10^{-5}$.

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Published In

Phys. Rev. D

Publication Date

April 27, 2021

Volume

106

Start / End Page

032013
 

Citation

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Collaboration, B., Gebauer, U., Beleño, C., Frey, A., Adachi, I., Adamczyk, K., … Zhukova, V. (2021). Measurement of the branching fractions of the $B^+ \to η\ell^+ ν_{\ell} $ and $B^+ \to η^{\prime} \ell^+ ν_{\ell} $ decays with signal-side only reconstruction in the full $q^2$ range. Phys. Rev. D, 106, 032013.
Collaboration, Belle, U. Gebauer, C. Beleño, A. Frey, I. Adachi, K. Adamczyk, H. Aihara, et al. “Measurement of the branching fractions of the $B^+ \to η\ell^+ ν_{\ell} $ and $B^+ \to η^{\prime} \ell^+ ν_{\ell} $ decays with signal-side only reconstruction in the full $q^2$ range.” Phys. Rev. D 106 (April 27, 2021): 032013.
Collaboration B, Gebauer U, Beleño C, Frey A, Adachi I, Adamczyk K, Aihara H, Said SA, Asner DM, 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, Bračko M, Browder TE, Campajola M, Cao L, Červenkov D, Chang M-C, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Cho S-J, Choi S-K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Das S, Dash N, Nardo GD, Capua FD, Dingfelder J, Doležal Z, Dong TV, Eidelman S, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, 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 MT, Hou W-S, Hsu C-L, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jia S, Jin Y, Joo CW, Joo KK, Kahn J, Kaliyar AB, Kang KH, Karyan G, Kawasaki T, Kichimi H, Kiesling C, Kim CH, Kim DY, Kim SH, Kim Y-K, Kinoshita K, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar M, Kumar R, Kumara K, Kuzmin A, Kwon Y-J, Lalwani K, Lange JS, Lee IS, Lee SC, Lewis P, Li YB, Gioi LL, Libby J, Lieret K, Liventsev D, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mrvar M, Mussa R, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nisar NK, Nishida S, Nishimura K, Ogawa S, Ono H, Onuki Y, Oskin P, Pakhlov P, Pakhlova G, Pardi S, Park H, Park S-H, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Purohit MV, Röhrken M, Rostomyan A, Rout N, Russo G, Sahoo D, Sandilya S, Sangal A, Santelj L, Sanuki T, Savinov V, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shapkin M, Sharma C, Shiu J-G, Shwartz B, Simon F, Solovieva E, Stanič S, Starič M, Stottler ZS, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Tonder RV, Varner G, Varvell KE, Vossen A, Waheed E, Wang CH, Wang M-Z, Wang P, Wang XL, Watanuki S, Wiechczynski J, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Ye H, Yin JH, Yuan CZ, Zhang ZP, Zhilich V, Zhukova V. Measurement of the branching fractions of the $B^+ \to η\ell^+ ν_{\ell} $ and $B^+ \to η^{\prime} \ell^+ ν_{\ell} $ decays with signal-side only reconstruction in the full $q^2$ range. Phys Rev D. 2021 Apr 27;106:032013.

Published In

Phys. Rev. D

Publication Date

April 27, 2021

Volume

106

Start / End Page

032013