Measurement of the τ lepton polarization and R (D∗) in the decay B ̄ →d∗τ- ν ̄ τ with one-prong hadronic τ decays at Belle

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Measurement of the τ lepton polarization and R (D∗) in the decay B ̄ →d∗τ- ν ̄ τ with one-prong hadronic τ decays at Belle. / The BELLE collaboration.

In: Physical Review D, Vol. 97, No. 1, 012004, 10.01.2018.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{a694c241b371438e9dc649d0ff223aa4,

title = "Measurement of the τ lepton polarization and R (D∗) in the decay B{\= } →d∗τ- ν{\= } τ with one-prong hadronic τ decays at Belle",

abstract = "With the full data sample of 772×106 B{\=B} pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay {\=B}→D∗τ-{\=ν}τ is studied with the hadronic τ decays τ-→π-ντ and τ-→ρ-ντ. The τ polarization Pτ(D∗) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R(D∗)=B({\=B}→D∗τ-{\=ν}τ)/B({\=B}→D∗-{\=ν}), where - denotes an electron or a muon. 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. The polarization values of Pτ(D∗)>+0.5 are excluded at the 90% confidence level.",

keywords = "DISPERSIVE BOUNDS, MESON DECAYS, B-DECAYS, IDENTIFICATION, MODEL",

author = "{The BELLE collaboration} and S. Hirose and T. Iijima and I. Adachi and K. Adamczyk and H. Aihara and {Al Said}, S. and Asner, {D. M.} and H. Atmacan and T. Aushev and R. Ayad and T. Aziz and V. Babu and I. Badhrees and Bakich, {A. M.} and V. Bansal and M. Berger and V. Bhardwaj and B. Bhuyan and J. Biswal and A. Bondar and A. Bozek and M. Bra{\v c}ko and Browder, {T. E.} and D. {\v C}ervenkov and Chang, {M. C.} and P. Chang and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and K. Cho and Choi, {S. K.} and Y. Choi and S. Choudhury and D. Cinabro and T. Czank and N. Dash and {Di Carlo}, S. and Z. Dole{\v Z}al and D. Dutta and S. Eidelman and Fast, {J. E.} and T. Ferber and Fulsom, {B. G.} and N. Gabyshev and A. Garmash and V. Shebalin and V. Vorobyev and V. Zhilich and V. Zhulanov",

note = "Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society.",

year = "2018",

month = jan,

day = "10",

doi = "10.1103/PhysRevD.97.012004",

language = "English",

volume = "97",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "1",

}

RIS

TY - JOUR

T1 - Measurement of the τ lepton polarization and R (D∗) in the decay B ̄ →d∗τ- ν ̄ τ with one-prong hadronic τ decays at Belle

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 - Aushev, T.

AU - Ayad, R.

AU - Aziz, T.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Czank, T.

AU - Dash, N.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Shebalin, V.

AU - Vorobyev, V.

AU - Zhilich, V.

AU - Zhulanov, V.

PY - 2018/1/10

Y1 - 2018/1/10

N2 - With the full data sample of 772×106 BB̄ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay B̄→D∗τ-ν̄τ is studied with the hadronic τ decays τ-→π-ντ and τ-→ρ-ντ. The τ polarization Pτ(D∗) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R(D∗)=B(B̄→D∗τ-ν̄τ)/B(B̄→D∗-ν̄), where - denotes an electron or a muon. 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. The polarization values of Pτ(D∗)>+0.5 are excluded at the 90% confidence level.

AB - With the full data sample of 772×106 BB̄ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay B̄→D∗τ-ν̄τ is studied with the hadronic τ decays τ-→π-ντ and τ-→ρ-ντ. The τ polarization Pτ(D∗) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R(D∗)=B(B̄→D∗τ-ν̄τ)/B(B̄→D∗-ν̄), where - denotes an electron or a muon. 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. The polarization values of Pτ(D∗)>+0.5 are excluded at the 90% confidence level.

KW - DISPERSIVE BOUNDS

KW - MESON DECAYS

KW - B-DECAYS

KW - IDENTIFICATION

KW - MODEL

UR - http://www.scopus.com/inward/record.url?scp=85041705686&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.97.012004

DO - 10.1103/PhysRevD.97.012004

M3 - Article

AN - SCOPUS:85041705686

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 1

M1 - 012004

ER -

ID: 10416930