Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Measurement of the τ Lepton Polarization and R (D∗) in the Decay B →d∗τ- ν τ. / Belle Collaboration.
в: Physical Review Letters, Том 118, № 21, 211801, 26.05.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Measurement of the τ Lepton Polarization and R (D∗) in the Decay B →d∗τ- ν τ
AU - The BELLE collaboration
AU - Hirose, S.
AU - Iijima, T.
AU - Adachi, I.
AU - Adamczyk, K.
AU - Aihara, H.
AU - Al Said, S.
AU - Asner, D. M.
AU - Atmacan, H.
AU - Аульченко, Владимир Михайлович
AU - Aushev, T.
AU - Ayad, R.
AU - Babu, V.
AU - Badhrees, I.
AU - Bakich, A. M.
AU - Bansal, V.
AU - Barberio, E.
AU - Behera, P.
AU - Berger, M.
AU - Bhuyan, B.
AU - Biswal, J.
AU - Bondar, A.
AU - Bonvicini, G.
AU - Bozek, A.
AU - Bračko, M.
AU - Browder, T. E.
AU - Červenkov, D.
AU - Chang, P.
AU - Chen, A.
AU - Cheon, B. G.
AU - Chilikin, K.
AU - Chistov, R.
AU - Cho, K.
AU - Choi, Y.
AU - Cinabro, D.
AU - Danilov, M.
AU - Dash, N.
AU - Di Carlo, S.
AU - Dingfelder, J.
AU - DoleŽal, Z.
AU - Drásal, Z.
AU - Eidelman, S.
AU - Epifanov, D.
AU - Gabyshev, N.
AU - Garmash, A.
AU - Krokovny, P.
AU - Matvienko, D.
AU - Shebalin, V.
AU - Usov, Y.
AU - Zhilich, V.
AU - Zhulanov, V.
N1 - We acknowledge Y. Sakaki, M. Tanaka, and R. Watanabe for their invaluable suggestions and help. We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya's TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, BK21Plus, WCU, RSRI, FLRFAS project and GSDC of KISTI (Korea); MNiSW and NCN (Poland); MES and RFAAE (Russia); ARRS (Slovenia); IKERBASQUE and UPV/EHU (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA). This work is supported by a Grant-in-Aid for Scientific Research (S) "Probing New Physics with TauLepton" (No. 26220706) and was partly supported by a Grant-in-Aid for JSPS Fellows (No. 25.3096). Publisher Copyright: © 2017 American Physical Society.
PY - 2017/5/26
Y1 - 2017/5/26
N2 - We report the first measurement of the τ lepton polarization Pτ(D∗) in the decay B→D∗τ-ντ as well as a new measurement of the ratio of the branching fractions R(D∗)=B(B→D∗τ-ντ)/B(B→D∗-ν), where - denotes an electron or a muon, and the τ is reconstructed in the modes τ-→π-ντ and τ-→ρ-ντ. We use the full data sample of 772×106 BB pairs recorded with the Belle detector at the KEKB electron-positron collider. Our results, Pτ(D∗)=-0.38±0.51(stat)-0.16+0.21(syst) and R(D∗)=0.270±0.035(stat)-0.025+0.028(syst), are consistent with the theoretical predictions of the standard model.
AB - We report the first measurement of the τ lepton polarization Pτ(D∗) in the decay B→D∗τ-ντ as well as a new measurement of the ratio of the branching fractions R(D∗)=B(B→D∗τ-ντ)/B(B→D∗-ν), where - denotes an electron or a muon, and the τ is reconstructed in the modes τ-→π-ντ and τ-→ρ-ντ. We use the full data sample of 772×106 BB pairs recorded with the Belle detector at the KEKB electron-positron collider. Our results, Pτ(D∗)=-0.38±0.51(stat)-0.16+0.21(syst) and R(D∗)=0.270±0.035(stat)-0.025+0.028(syst), are consistent with the theoretical predictions of the standard model.
UR - http://www.scopus.com/inward/record.url?scp=85019758244&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.118.211801
DO - 10.1103/PhysRevLett.118.211801
M3 - Article
VL - 118
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 21
M1 - 211801
ER -
ID: 10181141