在 Belle II 实验中寻找正负电子对撞产生的类轴子粒子。

Search for Axionlike Particles Produced in e^{+}e^{-} Collisions at Belle II.

作者信息

Abudinén F, Adachi I, Aihara H, Akopov N, Aloisio A, Ameli F, Anh Ky N, Asner D M, Aushev T, Aushev V, Babu V, Baehr S, Bahinipati S, Bambade P, Banerjee Sw, Bansal S, Baudot J, Becker J, Behera P K, Bennett J V, Bernieri E, Bernlochner F U, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bianchi F, Bilka T, Bilokin S, Biswas D, Bračko M, Branchini P, Braun N, Browder T E, Budano A, Bussino S, Campajola M, Casarosa G, Cecchi C, Červenkov D, Chang M-C, Chang P, Cheaib R, Chekelian V, Cheon B G, Chilikin K, Chirapatpimol K, Cho H-E, Cho K, Cho S-J, Choi S-K, Cinabro D, Corona L, Cremaldi L M, Cunliffe S, Dash N, Dattola F, De La Cruz-Burelo E, De Nardo G, De Nuccio M, De Pietro G, de Sangro R, Destefanis M, De Yta-Hernandez A, Di Capua F, Doležal Z, Dong T V, Dort K, Dossett D, Dujany G, Eidelman S, Ferber T, Ferlewicz D, Fiore S, Fodor A, Forti F, Fulsom B G, Ganiev E, Garg R, Garmash A, Gaur V, Gaz A, Gebauer U, Gellrich A, Geßler T, Giordano R, Giri A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Gradl W, Graziani E, Greenwald D, Hadjivasiliou C, Halder S, Hartbrich O, Hayasaka K, Hayashii H, Hearty C, Hedges M T, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill E C, Hirata H, Hoek M, Hohmann M, Hsu C-L, Hu Y, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Jackson P, Jacobs W W, Jaffe D E, Jang E-J, Jia S, Jin Y, Joo C, Kaliyar A B, Kandra J, Karyan G, Kato Y, Kichimi H, Kiesling C, Kim C-H, Kim D Y, Kim H J, Kim S-H, Kim Y-K, Kimmel T D, Kinoshita K, Kleinwort C, Kodyš P, Koga T, Kohani S, Komarov I, Korpar S, Kraetzschmar T M G, Križan P, Krokovny P, Kuhr T, Kumar M, Kumar R, Kumara K, Kurz S, Kwon Y-J, Lacaprara S, La Licata C, Lanceri L, Lange J S, Lee I-S, Lee S C, Leitl P, Levit D, Lewis P M, Li C, Li L K, Li Y B, Libby J, Lieret K, Li Gioi L, Liptak Z, Liu Q Y, Liventsev D, Longo S, Luo T, MacQueen C, Maeda Y, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuoka K, Matvienko D, Meggendorfer F, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Mizuk R, Azmi K, Mohanty G B, Moser H-G, Mrvar M, Müller F J, Mussa R, Nakamura I, Nakao M, Nakazawa H, Natochii A, Niebuhr C, Nisar N K, Nishida S, Nouxman M H A, Ogawa K, Ogawa S, Ono H, Oskin P, Ozaki H, Pakhlov P, Paladino A, Panta A, Paoloni E, Pardi S, Park H, Park S-H, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar T K, Peruzzi I, Peschke R, Piccolo M, Piilonen L E, Polat G, Popov V, Praz C, Prencipe E, Prim M T, Purohit M V, Rad N, Rados P, Rasheed R, Reif M, Reiter S, Remnev M, Ripp-Baudot I, Ritter M, Ritzert M, Rizzo G, Robertson S H, Rodríguez Pérez D, Roney J M, Rosenfeld C, Rostomyan A, Rout N, Sahoo D, Sakai Y, Sanders D A, Sandilya S, Sangal A, Santelj L, Sato Y, Savinov V, Scavino B, Schwanda C, Schwartz A J, Seddon R M, Seino Y, Selce A, Senyo K, Serrano J, Sevior M E, Sfienti C, Shiu J-G, Sibidanov A, Simon F, Sobie R J, Soffer A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler Z S, Stroili R, Strube J, Sumihama M, Sumiyoshi T, Summers D J, Sutcliffe W, Svidras H, Tabata M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taras P, Tenchini F, Tonelli D, Torassa E, Trabelsi K, Uchida M, Uglov T, Unger K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Vahsen S E, van Tonder R, Varner G S, Varvell K E, Vinokurova A, Vitale L, Waheed E, Wakai M, Wakeling H M, Wang C H, Wang M-Z, Wang X L, Warburton A, Watanabe M, Watanuki S, Webb J, Wehle S, Welsch M, Wessel C, Wiechczynski J, Windel H, Won E, Wu L J, Xu X P, Yabsley B, Yan W, Yang S B, Ye H, Yonenaga M, Yuan C Z, Yusa Y, Zani L, Zhou Q D, Zhukova V I

机构信息

INFN Sezione di Trieste, I-34127 Trieste.

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

出版信息

Phys Rev Lett. 2020 Oct 16;125(16):161806. doi: 10.1103/PhysRevLett.125.161806.

DOI:10.1103/PhysRevLett.125.161806

PMID:33124872

Abstract

We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e^{+}e^{-}→γa, a→γγ in the mass range 0.2<m_{a}<9.7 GeV/c^{2} using data corresponding to an integrated luminosity of (445±3) pb^{-1}. Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength g_{aγγ} of ALPs to photons at the level of 10^{-3} GeV^{-1}. The limits are the most restrictive to date for 0.2<m_{a}<1 GeV/c^{2}.

摘要

我们利用超级KEKB对撞机上的 Belle II 探测器，开展了一项寻找轻赝标量粒子 a 直接衰变为两个光子的研究。我们在质量范围 0.2 < mₐ < 9.7 GeV/c² 内，使用对应积分亮度为(445±3) pb⁻¹的数据，寻找过程 e⁺e⁻→γa，a→γγ。在标准模型的扩展理论中，经常假定主要与标准模型规范玻色子相互作用的轻赝标量粒子（所谓的类轴子粒子或 ALP）。我们没有发现 ALP 的证据，并在 10⁻³ GeV⁻¹ 的水平上，对 ALP 与光子的耦合强度 gₐγγ 设置了 95%置信水平的上限。对于 0.2 < mₐ < 1 GeV/c²，这些限制是迄今为止最严格的。