B→K^{*}ℓ^{+}ℓ^{-}的轻子味相关角分析

Lepton-Flavor-Dependent Angular Analysis of B→K^{*}ℓ^{+}ℓ^{-}.

作者信息

Wehle S, Niebuhr C, Yashchenko S, Adachi I, Aihara H, Al Said S, Asner D M, Aulchenko V, Aushev T, Ayad R, Aziz T, Babu V, Bakich A M, Bansal V, Barberio E, Bartel W, Behera P, Bhuyan B, Biswal J, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder T E, Červenkov D, Chang P, Chekelian V, Chen A, Cheon B G, Chilikin K, Chistov R, Cho K, Choi Y, Cinabro D, Dash N, Dingfelder J, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast J E, Ferber T, Fulsom B G, Gaur V, Gabyshev N, Garmash A, Gillard R, Goldenzweig P, Golob B, Grzymkowska O, Guido E, Haba J, Hara T, Hayasaka K, Hayashii H, Hedges M T, Hou W-S, Hsu C-L, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jacobs W W, Jaegle I, Jeon H B, Jin Y, Joffe D, Joo K K, Julius T, Kaliyar A B, Kang K H, Karyan G, Katrenko P, Kawasaki T, Kichimi H, Kiesling C, Kim D Y, Kim H J, Kim J B, Kim K T, Kim M J, Kim S H, Kinoshita K, Koch L, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumita T, Kuzmin A, Kwon Y-J, Lange J S, Li C H, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Miyabayashi K, Miyake H, Mizuk R, Mohanty G B, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath K J, Natkaniec Z, Nayak M, Nisar N K, Nishida S, Ogawa S, Ono H, Onuki Y, Pakhlova G, Pal B, Park C-S, Park C W, Park H, Paul S, Pesántez L, Piilonen L E, Pulvermacher C, Rauch J, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Schwartz A J, Seino Y, Senyo K, Seon O, Seong I S, Sevior M E, Shen C P, Shibata T-A, Shiu J-G, Shwartz B, Simon F, Sinha R, Solovieva E, Starič M, Strube J F, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Tsuboyama T, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Vahsen S E, Van Hulse C, Varner G, Varvell K E, Vorobyev V, Vossen A, Waheed E, Wang C H, Wang M-Z, Wang P, Watanabe M, Watanabe Y, Widmann E, Williams K M, Won E, Yamamoto H, Yamashita Y, Ye H, Yook Y, Yuan C Z, Yusa Y, Zhang Z P, Zhilich V, Zhukova V, Zhulanov V, Ziegler M, Zupanc A

机构信息

Deutsches Elektronen-Synchrotron, 22607 Hamburg.

SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193.

出版信息

Phys Rev Lett. 2017 Mar 17;118(11):111801. doi: 10.1103/PhysRevLett.118.111801. Epub 2017 Mar 13.

DOI:10.1103/PhysRevLett.118.111801

PMID:28368653

Abstract

We present a measurement of angular observables and a test of lepton flavor universality in the B→K^{*}ℓ^{+}ℓ^{-} decay, where ℓ is either e or μ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb^{-1} containing 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance with the Belle detector at the asymmetric-energy e^{+}e^{-} collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ.

摘要

我们给出了在(B→K^{*}ℓ^{+}ℓ^{-})衰变中角可观测量的测量以及轻子味普适性的检验，其中(ℓ)为电子或缪子。该分析是在一个对应于(711 fb^{-1})积分亮度的数据样本上进行的，该样本包含(772×10^{6})对(BB)（上划线），是在非对称能量正负电子对撞机KEKB上使用Belle探测器在(\Upsilon(4S))共振处收集的。结果与标准模型（SM）预期一致，其中在缪子模式中观察到与SM预测的最大偏差，局部显著性为(2.6\sigma)。