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$τ$ lepton mass measurement at Belle II

Publication ,  Journal Article
Collaboration, BII; Abudinén, F; Adachi, I; Adak, R; Adamczyk, K; Ahlburg, P; Ahn, JK; Aihara, H; Akopov, N; Aloisio, A; Ameli, F; Andricek, L ...
August 11, 2020

The reconstruction of tau-pair production, $e^{+}e^{-} \to \tau^{+}\tau^{-}$, from the subsequent 3-prong ($\tau^{+} \rightarrow \pi^{+} \pi^{-} \pi^{+} \bar{\nu}_{\tau}$) and 1-prong ($\tau^{-} \to \ell^{-} \bar{\nu}_{\ell} \nu_{\tau}$, $\tau^{-} \to h^{-} \nu_{\tau}$ or $\tau^{-} \to \pi^{-} \pi^0 \nu_{\tau}$) decays, is presented using 8.8 fb$^{-1}$ of $e^{+}e^{-}$ collision data of Belle II at the center-of-mass energy $\sqrt{s} = m_{\Upsilon(4S)}$. The pseudomass technique developed by the ARGUS experiment is used to measure the $\tau$-lepton mass $m_{\tau}$ in the 3-prong $\tau^{+} \to \pi^{+} \pi^{-} \pi^{+} \bar{\nu}_{\tau} $ decay, resulting in $m_{\tau} = 1777.28 \pm 0.75~{\rm (stat.)} \pm 0.33 ~{\rm (sys.)}~{\rm{MeV}/\rm{c}^2}$.

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Publication Date

August 11, 2020
 

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Collaboration, B. I. I., Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., … Wang, B. (2020). $τ$ lepton mass measurement at Belle II.
Collaboration, Belle I. I., F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, et al. “$τ$ lepton mass measurement at Belle II,” August 11, 2020.
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, et al. $τ$ lepton mass measurement at Belle II. 2020 Aug 11;
Collaboration, Belle I. I., et al. $τ$ lepton mass measurement at Belle II. Aug. 2020.
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, Ahn JK, Aihara H, Akopov N, Aloisio A, Ameli F, Andricek L, Ky NA, Asner DM, Atmacan H, Aulchenko V, Aushev T, Aushev V, Aziz T, Babu V, Bacher S, Baehr S, Bahinipati S, Bakich AM, Bambade P, Banerjee S, Bansal S, Barrett M, Batignani G, Baudot J, Beaulieu A, Becker J, Behera PK, Bender M, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bhuyan B, Bianchi F, Bilka T, Bilokin S, Biswas D, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Branchini P, Braun N, Briere RA, Browder TE, Brown DN, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Caria G, Casarosa G, Cecchi C, Červenkov D, Chang M-C, Chang P, Cheaib R, Chekelian V, Chen YQ, Chen Y-T, Cheon BG, Chilikin K, Chirapatpimol K, Cho H-E, Cho K, Cho S-J, Choi S-K, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cuesta D, Cunliffe S, Czank T, Dash N, Dattola F, Cruz-Burelo EDL, Nardo GD, Nuccio MD, Pietro GD, Sangro RD, Deschamps B, Destefanis M, Dey S, Yta-Hernandez AD, Canto AD, Capua FD, Carlo SD, Dingfelder J, Doležal Z, Jiménez ID, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fischer P, Fodor A, Forti F, Frey A, Friedl M, Fulsom BG, Gabriel M, Gabyshev N, Ganiev E, Garcia-Hernandez M, Garg R, Garmash A, Gaur V, Gaz A, Gebauer U, Gelb M, Gellrich A, Gemmler J, Geßler T, Getzkow D, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Grace P, Gradl W, Graziani E, Greenwald D, Guan Y, Hadjivasiliou C, Halder S, Hara K, Hara T, Hartbrich O, Hauth T, Hayasaka K, Hayashii H, Hearty C, Heck M, Hedges MT, Cruz IHDL, Villanueva MH, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hollitt S, Hotta T, Hsu C-L, Hu Y, Huang K, Iijima T, Inami K, Inguglia G, Jabbar JI, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Iwata S, Jackson P, Jacobs WW, Jaegle I, Jaffe DE, Jang E-J, Jeandron M, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kadenko I, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Kang KH, Kapusta P, Karl R, Karyan G, Kato Y, Kawai H, Kawasaki T, Keck T, Ketter C, Kichimi H, Kiesling C, Kim BH, Kim C-H, Kim DY, Kim HJ, Kim JB, Kim K-H, Kim K, Kim S-H, Kim Y-K, Kim Y, Kimmel TD, Kindo H, Kinoshita K, Kirby B, Kleinwort C, Knysh B, Kodyš P, Koga T, Kohani S, Komarov I, Konno T, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krohn JF, Krokovny P, Krüger H, Kuehn W, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kumita T, Kunigo T, Künzel M, Kurz S, Kuzmin A, Kvasnička P, Kwon Y-J, Lacaprara S, Lai Y-T, Licata CL, Lalwani K, Lanceri L, Lange JS, Lautenbach K, Laycock PJ, Diberder FRL, Lee I-S, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li LK, Li SX, Li YM, Li YB, Libby J, Lieret K, Gioi LL, Lin J, Liptak Z, Liu QY, Liu ZA, Liventsev D, Longo S, Loos A, Lu P, Lubej M, Lueck T, Luetticke F, Luo T, MacQueen C, Maeda Y, Maggiora M, Maity S, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, McNeil J, Meggendorfer F, Mei JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Azmi K, Mohanty GB, Moon H, Moon T, Grimaldo JAM, Morda A, Morii T, Moser H-G, Mrvar M, Mueller F, Müller FJ, Muller T, Muroyama G, Murphy C, Mussa R, Nakagiri K, Nakamura I, Nakamura KR, Nakano E, Nakao M, Nakayama H, Nakazawa H, Nanut T, Natkaniec Z, Natochii A, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Niiyama M, Ninkovic J, Nisar NK, Nishida S, Nishimura K, Nishimura M, Nouxman MHA, Oberhof B, Ogawa K, Ogawa S, Olsen SL, Onishchuk Y, Ono H, Onuki Y, Oskin P, Oxford ER, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Pang T, Panta A, Paoloni E, Pardi S, Park C, Park H, Park S-H, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Podesta-Lerma PLM, Polat G, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rad N, Rados P, Rasheed R, Reif M, Reiter S, Remnev M, Resmi PK, Ripp-Baudot I, Ritter M, Ritzert M, Rizzo G, Rizzuto LB, Robertson SH, Pérez DR, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Rozanska M, Russo G, Sahoo D, Sakai Y, Sanders DA, Sandilya S, Sangal A, Santelj L, Sartori P, Sasaki J, Sato Y, Savinov V, Scavino B, Schram M, Schreeck H, Schueler J, Schwanda C, Schwartz AJ, Schwenker B, Seddon RM, Seino Y, Selce A, Senyo K, Seong IS, Serrano J, Sevior ME, Sfienti C, Shebalin V, Shen CP, Shibuya H, Shiu J-G, Shwartz B, Sibidanov A, Simon F, Singh JB, Skambraks S, Smith K, Sobie RJ, Soffer A, Sokolov A, Soloviev Y, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Stypula J, Sumihama M, Sumisawa K, Sumiyoshi T, Summers DJ, Sutcliffe W, Suzuki K, Suzuki SY, Svidras H, Tabata M, Takahashi M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taniguchi N, Tao Y, Taras P, Tenchini F, Tonelli D, Torassa E, Trabelsi K, Tsuboyama T, Tsuzuki N, Uchida M, Ueda I, Uehara S, Ueno T, Uglov T, Unger K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Vahsen SE, Tonder RV, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vorobyev V, Vossen A, Waheed E, Wakeling HM, Wan K, Abdullah WW, Wang B. $τ$ lepton mass measurement at Belle II. 2020 Aug 11;

Publication Date

August 11, 2020