在 Belle 实验中寻找罕见的 b→dℓ⁺ℓ⁻ 跃迁。

Search for Rare b→dℓ^{+}ℓ^{-} Transitions at Belle.

作者信息

Adachi I, Aggarwal L, Aihara H, Akopov N, Aloisio A, Al Said S, Asner D M, Atmacan H, Aushev V, Aversano M, Ayad R, Babu V, Bae H, Bahinipati S, Bambade P, Banerjee Sw, Bansal S, Barrett M, Baudot J, Beaubien A, Becherer F, Becker J, Belous K, Bennett J V, Bernlochner F U, Bertacchi V, Bertemes M, Bertholet E, Bessner M, Bettarini S, Bianchi F, Bierwirth L, Bilka T, Biswas D, Bobrov A, Bodrov D, Bolz A, Borah J, Bozek A, Bračko M, Branchini P, Briere R A, Browder T E, Budano A, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Cerasoli J, Chang M-C, Chang P, Cheaib R, Cheema P, Chen C, Cheon B G, Chilikin K, Chirapatpimol K, Cho H-E, Cho K, Cho S-J, Choi S-K, Choi Y, Choudhury S, Cochran J, Corona L, Das S, Dattola F, De La Cruz-Burelo E, De La Motte S A, de Marino G, De Nardo G, De Pietro G, de Sangro R, Destefanis M, Dey S, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong T V, Dorigo M, Dort K, Dossett D, Dreyer S, Dubey S, Dugic K, Dujany G, Ecker P, Epifanov D, Feichtinger P, Ferber T, Ferlewicz D, Fillinger T, Finck C, Finocchiaro G, Fodor A, Forti F, Fulsom B G, Gabrielli A, Ganiev E, Garcia-Hernandez M, Garg R, Gaudino G, Gaur V, Gellrich A, Ghevondyan G, Ghosh D, Ghumaryan H, Giakoustidis G, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Gogota O, Goldenzweig P, Grammatico T, Granderath S, Graziani E, Greenwald D, Gruberová Z, Gu T, Guan Y, Gudkova K, Han Y, Hara T, Hayasaka K, Hayashii H, Hazra S, Hedges M T, Heidelbach A, Heredia de la Cruz I, Hernández Villanueva M, Higuchi T, Hoek M, Hohmann M, Horak P, Hsu C-L, Humair T, Iijima T, Inami K, Inguglia G, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs W W, Jang E-J, Ji Q P, Jia S, Jin Y, Junkerkalefeld H, Kalita D, Kaliyar A B, Kandra J, Kang S, Karyan G, Kawasaki T, Keil F, Kiesling C, Kim C-H, Kim D Y, Kim K-H, Kim Y-K, Kinoshita K, Kodyš P, Koga T, Kohani S, Kojima K, Korobov A, Korpar S, Kovalenko E, Kowalewski R, Kraetzschmar T M G, Križan P, Krokovny P, Kuhr T, Kulii Y, Kumar J, Kumar M, Kumara K, Kunigo T, Kuzmin A, Kwon Y-J, Lacaprara S, Lai Y-T, Lalwani K, Lam T, Lanceri L, Lange J S, Laurenza M, Lautenbach K, Leboucher R, Le Diberder F R, Lee M J, Leo P, Levit D, Lewis P M, Li L K, Li Y, Li Y B, Libby J, Liu Q Y, Liu Y, Liu Z Q, Liventsev D, Longo S, Lueck T, Luo T, Lyu C, Ma Y, Maggiora M, Maharana S P, Maiti R, Maity S, Mancinelli G, Manfredi R, Manoni E, Mantovano M, Marcantonio D, Marinas C, Martellini C, Martinov T, Massaccesi L, Masuda M, Matvienko D, Maurya S K, McKenna J A, Mehta R, Meier F, Merola M, Metzner F, Miller C, Mirra M, Mitra S, Miyabayashi K, Miyake H, Mizuk R, Mohanty G B, Moneta S, Moser H-G, Mrvar M, Mussa R, Nakamura I, Nakamura K R, Nakao M, Nakazawa Y, Narimani Charan A, Naruki M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nazaryan G, Neu M, Ninkovic J, Nishida S, Ogawa S, Onishchuk Y, Ono H, Otani F, Pakhlova G, Panta A, Pardi S, Parham K, Park S-H, Paschen B, Passeri A, Patra S, Pedlar T K, Peschke R, Pestotnik R, Piilonen L E, Podesta-Lerma P L M, Podobnik T, Pokharel S, Praz C, Prell S, Prencipe E, Prim M T, Prudiiev I, Purwar H, Rados P, Raeuber G, Raiz S, Rauls N, Reif M, Reiter S, Remnev M, Ripp-Baudot I, Rizzo G, Robertson S H, Roehrken M, Roney J M, Rostomyan A, Rout N, Russo G, Sanders D A, Sandilya S, Santelj L, Sato Y, Savinov V, Scavino B, Schmitt C, Schnell G, Schwanda C, Schwickardi M, Seino Y, Selce A, Senyo K, Sevior M E, Sfienti C, Shan W, Shi X D, Shillington T, Shiu J-G, Shtol D, Shwartz B, Sibidanov A, Simon F, Singh J B, Skorupa J, Sobie R J, Sobotzik M, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stavroulakis P, Stefkova S, Stroili R, Sumihama M, Sumisawa K, Sutcliffe W, Suwonjandee N, Svidras H, Takizawa M, Tamponi U, Tanida K, Tenchini F, Tittel O, Tiwary R, Torassa E, Trabelsi K, Tsaklidis I, Uchida M, Ueda I, Uglov T, Unger K, Unno Y, Uno K, Uno S, Urquijo P, Ushiroda Y, Vahsen S E, van Tonder R, Varvell K E, Veronesi M, Vinokurova A, Vismaya V S, Vitale L, Vobbilisetti V, Volpe R, Wakai M, Wallner S, Wang E, Wang M-Z, Wang X L, Wang Z, Warburton A, Watanabe M, Watanuki S, Wessel C, Won E, Xu X P, Yabsley B D, Yamada S, Yan W, Yang S B, Yelton J, Yin J H, Yoshihara K, Yuan C Z, Zani L, Zeng F, Zhang B, Zhang Y, Zhilich V, Zhou Q D, Zhukova V I, Žlebčík R

出版信息

Phys Rev Lett. 2024 Sep 6;133(10):101804. doi: 10.1103/PhysRevLett.133.101804.

DOI:10.1103/PhysRevLett.133.101804

PMID:39303229

Abstract

We present the results of a search for the b→dℓ^{+}ℓ^{-} flavor-changing neutral-current rare decays B^{+,0}→(η,ω,π^{+,0},ρ^{+,0})e^{+}e^{-} and B^{+,0}→(η,ω,π^{0},ρ^{+})μ^{+}μ^{-} using a 711 fb^{-1} data sample that contains 772×10^{6} BB[over ¯] events. The data were collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We find no evidence for signal and set upper limits on branching fractions at the 90% confidence level in the range (3.8-47)×10^{-8} depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels B^{+,0}→(ω,ρ^{+,0})e^{+}e^{-} and B^{+,0}→(ω,ρ^{+})μ^{+}μ^{-}.

摘要

我们展示了利用一个包含(772×10^{6})个(B\overline{B})事件的(711 fb^{-1})数据样本，对味改变中性流稀有衰变(B^{+,0}→(η,ω,π^{+,0},ρ^{+,0})e^{+}e^{-})和(B^{+,0}→(η,ω,π^{0},ρ^{+})μ^{+}μ^{-})进行搜索的结果。数据是在KEKB非对称能量(e^{+}e^{-})对撞机上，使用Belle探测器在(Υ(4S))共振处收集的。我们没有发现信号证据，并在(90%)置信水平下，根据衰变通道在((3.8 - 47)×10^{-8})范围内设置了分支比的上限。所获得的限制是世界最佳结果。这是首次对(B^{+,0}→(ω,ρ^{+,0})e^{+}e^{-})和(B^{+,0}→(ω,ρ^{+})μ^{+}μ^{-})通道进行搜索。