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Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} τ^- \barν_τ$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \barν_{\ell}$ decays with a semileptonic tagging method

Publication ,  Journal Article
Abdesselam, A; Adachi, I; Adamczyk, K; Aihara, H; Said, SA; Arinstein, K; Arita, Y; Asner, DM; Aso, T; Atmacan, H; Aulchenko, V; Aushev, T ...
March 22, 2016

We report a measurement of ratio ${\cal R}(D^*) = {\cal B}(\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or a muon. The results are based on a data sample containing $772\times10^6$ $B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. We select a sample of $B^0 \bar{B}^0$ pairs by reconstructing both $B$ mesons in semileptonic decays to $D^{*\mp} \ell^{\pm}$. We measure ${\cal R}(D^*)= 0.302 \pm 0.030({\rm stat)} \pm 0.011({\rm syst)}$, which is within $1.6 \sigma$ of the Standard Model theoretical expectation, where $\sigma$ is the standard deviation including systematic uncertainties.

Duke Scholars

Publication Date

March 22, 2016
 

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Abdesselam A, Adachi I, Adamczyk K, Aihara H, Said SA, Arinstein K, Arita Y, Asner DM, Aso T, Atmacan H, Aulchenko V, Aushev T, Ayad R, Aziz T, Babu V, Badhrees I, Bahinipati S, Bakich AM, Bala A, Ban Y, Bansal V, Barberio E, Barrett M, Bartel W, Bay A, Bedny I, Behera P, Belhorn M, Belous K, Besson D, Bhardwaj V, Bhuyan B, Bischofberger M, Biswal J, Bloomfield T, Blyth S, Bobrov A, Bondar A, Bonvicini G, Bookwalter C, Boulahouache C, Bozek A, Brač M, Breibeck F, Brodzicka J, Browder TE, Č D, Chang M-C, Chang P, Chao Y, Chekelian V, Chen A, Chen K-F, Chen P, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi S-K, Choi Y, Cinabro D, Crnkovic J, Dalseno J, Danilov M, Dash N, Carlo SD, Dingfelder J, Dolež Z, Drásal Z, Drutskoy A, Dubey S, Dutta D, Dutta K, Eidelman S, Epifanov D, Esen S, Farhat H, Fast JE, Feindt M, Ferber T, Frey A, Frost O, Fujikawa M, Fulsom BG, Gaur V, Gabyshev N, Ganguly S, Garmash A, Getzkow D, Gillard R, Giordano F, Glattauer R, Goh YM, Goldenzweig P, Golob B, Greenwald D, Perdekamp MG, Grygier J, Grzymkowska O, Guo H, Haba J, Hamer P, Han YL, Hara K, Hara T, Hasegawa Y, Hasenbusch J, Hayasaka K, Hayashii H, He XH, Heck M, Hedges MT, Heffernan D, Heider M, Heller A, Higuchi T, Himori S, Hirose S, Horiguchi T, Hoshi Y, Hoshina K, Hou W-S, Hsiung YB, Hsu C-L, Huschle M, Hyun HJ, Igarashi Y, Iijima T, Imamura M, Inami K, Inguglia G, Ishikawa A, Itagaki K, Itoh R, Iwabuchi M, Iwasaki M, Iwasaki Y, Iwata S, Jacobs WW, Jaegle I, Jeon HB, Joffe D, Jones M, Joo KK, Julius T, Kakuno H, Kang JH, Kang KH, Kapusta P, Kataoka SU, Kato E, Kato Y, Katrenko P, Kawai H, Kawasaki T, Keck T, Kichimi H, Kiesling C, Kim BH, Kim DY, Kim HJ, Kim H-J, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SH, Kim SK, Kim YJ, Kinoshita K, Kleinwort C, Klucar J, Ko BR, Kobayashi N, Koblitz S, Kodyš P, Koga Y, Korpar S, Kotchetkov D, Kouzes RT, Križ P, Krokovny P, Kronenbitter B, Kuhr T, Kumar R, Kumita T, Kurihara E, Kuroki Y, Kuzmin A, Kvasnič P, Kwon Y-J, Lai Y-T, Lange JS, Lee DH, Lee IS, Lee S-H, Leitgab M, Leitner R, Levit D, Lewis P, Li CH, Li H, Li J, Li L, Li X, Li Y, Gioi LL, Libby J, Limosani A, Liu C, Liu Y, Liu ZQ, Liventsev D, Loos A, Louvot R, Lubej M, Lukin P, Luo T, MacNaughton J, Masuda M, Matsuda T, Matvienko D, Matyja A, McOnie S, Mikami Y, Miyabayashi K, Miyachi Y, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohanty GB, Mohanty S, Mohapatra D, Moll A, Moon HK, Mori T, Morii T, Moser H-G, Müller T, Muramatsu N, Mussa R, Nagamine T, Nagasaka Y, Nakahama Y, Nakamura I, Nakamura KR, Nakano E, Nakano H, Nakano T, Nakao M, Nakayama H, Nakazawa H, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Nedelkovska E, Negishi K, Neichi K, Ng C, Niebuhr C, Niiyama M, Nisar NK, Nishida S, Nishimura K, Nitoh O, Nozaki T, Ogawa A, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ono Y, Onuki Y, Ostrowicz W, Oswald C, Ozaki H, Pakhlov P, Pakhlova G, Pal B, Palka H, Panzenböck E, Park C-S, Park CW, Park H, Park KS, Paul S, Peak LS, Pedlar TK, Peng T, Pesá L, Pestotnik R, Peters M, Petrič M, Piilonen LE, Poluektov A, Prasanth K, Prim M, Prothmann K, Pulvermacher C, Purohit MV, Rauch J, Reisert B, Ribež E, Ritter M, Röhrken M, Rorie J, Rostomyan A, Rozanska M, Rummel S, Ryu S, Sahoo H, Saito T, Sakai K, Sakai Y, Sandilya S, Santel D, Santelj L, Sanuki T, Sasao N, Sato Y, Savinov V, Schlü T, Schneider O, Schnell G, Schönmeier P, Schram M, Schwanda C, Schwartz AJ, Schwenker B, Seidl R, Seino Y, Sekiya A, Semmler D, Senyo K, Seon O, Seong IS, Sevior ME, Shang L, Shapkin M, Shebalin V, Shen CP, Shibata T-A, Shibuya H, Shinomiya S, Shiu J-G, Shwartz B, Sibidanov A, Simon F, Singh JB, Sinha R, Smerkol P, Sohn Y-S, Sokolov A, Soloviev Y, Solovieva E, Stanič S, Starič M, Steder M, Strube JF, Stypula J, Sugihara S, Sugiyama A, Sumihama M, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Suzuki Z, Takeichi H, Takizawa M, Tamponi U, Tanaka M, Tanaka S, Tanida K, Taniguchi N, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Trusov V, Tse YF, Tsuboyama T, Uchida M, Uchida T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Uozumi S, Urquijo P, Ushiroda Y, Usov Y, Vahsen SE, Hulse CV, Vanhoefer P, Varner G, Varvell KE, Vervink K, Vinokurova A, Vorobyev V, Vossen A, Wagner MN, Wang CH, Wang J, Wang M-Z, Wang P, Wang XL, Watanabe M, Watanabe Y, Wedd R, Wehle S, White E, Wiechczynski J, Williams KM, Won E, Yabsley BD, Yamada S, Yamamoto H, Yamaoka J, Yamashita Y, Yamauchi M, Yashchenko S, Ye H, Yelton J, Yook Y, Yuan CZ, Yusa Y, Zhang CC, Zhang LM, Zhang ZP, Zhao L, Zhilich V, Zhukova V, Zhulanov V, Ziegler M, Zivko T, Zupanc A, Zwahlen N, Zyukova O. Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} τ^- \barν_τ$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \barν_{\ell}$ decays with a semileptonic tagging method. 2016 Mar 22;

Publication Date

March 22, 2016