Combined analysis of semileptonic B decays to D and D: R(D()), |Vcb|, and new physics

被引：231

作者：

Bernlochner, Florian U. ^{[1
]}

Ligeti, Zoltan ^{[2
]}

Papucci, Michele ^{[2
]}

Robinson, Dean J. ^{[3
]}

机构：

[1] Friedrich Wilhelms Univ Bonn, Phys Inst Rheinischen, D-53115 Bonn, Germany

[2] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[3] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 11期

关键词：

QUARK EFFECTIVE THEORY; HEAVY-QUARK; FORM-FACTORS; DISPERSIVE BOUNDS; POLE MASS; RENORMALONS; CONSTRAINTS;

D O I：

10.1103/PhysRevD.95.115008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The measured (B) over bar -> D-(*()) l (nu) over bar decay rates for light leptons (l = e, mu) constrain all (B) over bar -> D-(*()) semileptonic form factors, by including both the leading and O(Lambda(QCD)/m(c,b)) subleading Isgur-Wise functions in the heavy quark effective theory. We perform a novel combined fit to the (B) over bar -> D-(*()) l (nu) over bar decay distributions to predict the (B) over bar -> D-(*()) tau(nu) over bar rates and determine the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar. Most theoretical and experimental papers have neglected uncertainties in the predictions for form factor ratios at order Lambda(QCD)/m(c,b), which we include. We also calculate O(Lambda(QCD)/m(c,b)) and O(alpha(s)) contributions to semileptonic (B) over bar -> D-(*()) l (nu) over bar decays for all possible b -> c currents. This result has not been available for the tensor current form factors, and for two of those, which are O(Lambda(QCD)/m(c,b)), the corrections are of the same order as approximations used in the literature. These results allow us to determine with improved precision how new physics may affect the (B) over bar -> D-(*()) tau(nu) over bar rates. Our predictions can be systematically improved with more data; they need not rely on lattice QCD results, although these can be incorporated.

引用

页数：17

共 66 条

[1] Measurement of the Ratio of Branching Fractions B((B)over-bar0 → D*+τ-(ν)over-barτ)/B((B)over-bar0 → D*+μ-(ν)over-barμ) [J].

Aaij, R. ;

Adeva, B. ;

Adinolfi, M. ;

Affolder, A. ;

Ajaltouni, Z. ;

Akar, S. ;

Albrecht, J. ;

Alessio, F. ;

Alexander, M. ;

Ali, S. ;

Alkhazov, G. ;

Cartelle, P. Alvarez ;

Alves, A. A., Jr. ;

Amato, S. ;

Amerio, S. ;

Amhis, Y. ;

An, L. ;

Anderlini, L. ;

Anderson, J. ;

Andreassi, G. ;

Andreotti, M. ;

Andrews, J. E. ;

Appleby, R. B. ;

Gutierrez, O. Aquines ;

Archilli, F. ;

d'Argent, P. ;

Artamonov, A. ;

Artuso, M. ;

Aslanides, E. ;

Auriemma, G. ;

Baalouch, M. ;

Bachmann, S. ;

Back, J. J. ;

Badalov, A. ;

Baesso, C. ;

Baldini, W. ;

Barlow, R. J. ;

Barschel, C. ;

Barsuk, S. ;

Barter, W. ;

Batozskaya, V. ;

Battista, V. ;

Bay, A. ;

Beaucourt, L. ;

Beddow, J. ;

Bedeschi, F. ;

Bediaga, I. ;

Bel, L. J. ;

Bellee, V. ;

Belyaev, I. .

PHYSICAL REVIEW LETTERS, 2015, 115 (11)

[2]

Aaij R., 2015, Phys. Rev. Lett., V115

[3]

Abdesselam A., ARXIV170201521

[4]

Abdesselam A., ARXIV160806391

[5]

Abdesselam A., ARXIV160306711

[6] New physics in the kinematic distributions of (B)over-bar → D(*)τ-(→ l-(ν)over-barlντ)(ν)over-barτ [J].

Alonso, Rodrigo ;

Kobach, Andrew ;

Camalich, Jorge Martin .

PHYSICAL REVIEW D, 2016, 94 (09)

[7]

[Anonymous], ARXIV161207233

[8] Review of lattice results concerning low-energy particle physics [J].

Aoki, S. ;

Aoki, Y. ;

Becirevic, D. ;

Bernard, C. ;

Blum, T. ;

Colangelo, G. ;

Della Morte, M. ;

Dimopoulos, P. ;

Duerr, S. ;

Fukaya, H. ;

Golterman, M. ;

Gottlieb, Steven ;

Hashimoto, S. ;

Heller, U. M. ;

Horsley, R. ;

Juttner, A. ;

Kaneko, T. ;

Lellouch, L. ;

Leutwyler, H. ;

Lin, C. -J. D. ;

Lubicz, V. ;

Lunghi, E. ;

Mawhinney, R. ;

Onogi, T. ;

Pena, C. ;

Sachrajda, C. T. ;

Sharpe, S. R. ;

Simula, S. ;

Sommer, R. ;

Vladikas, A. ;

Wenger, U. ;

Wittig, H. .

EUROPEAN PHYSICAL JOURNAL C, 2017, 77 (02)

[9] B → Dlν form factors at nonzero recoil and |Vcb| from 2+1-flavor lattice QCD [J].

Bailey, Jon A. ;

Bazavov, A. ;

Bernard, C. ;

Bouchard, C. M. ;

DeTar, C. ;

Du, Daping ;

El-Khadra, A. X. ;

Foley, J. ;

Freeland, E. D. ;

Gamiz, E. ;

Gottlieb, Steven ;

Heller, U. M. ;

Komijani, J. ;

Kronfeld, A. S. ;

Laiho, J. ;

Levkova, L. ;

Mackenzie, P. B. ;

Neil, E. T. ;

Qiu, Si-Wei ;

Simone, J. ;

Sugar, R. ;

Toussaint, D. ;

van de Water, R. S. ;

Zhou, Ran .

PHYSICAL REVIEW D, 2015, 92 (03)

[10] Update of |Vcb| from the (B)over-bar → D*l(ν)over-bar form factor at zero recoil with three-flavor lattice QCD [J].

Bailey, Jon A. ;

Bazavov, A. ;

Bernard, C. ;

Bouchard, M. ;

Detar, C. ;

Du, Daping ;

El-Khadra, A. X. ;

Foley, J. ;

Freeland, E. D. ;

Gamiz, E. ;

Gottlieb, Steven ;

Heller, U. M. ;

Kronfeld, A. S. ;

Laiho, J. ;

Levkova, L. ;

Mackenzie, P. B. ;

Neil, E. T. ;

Qiu, Si-Wei ;

Simone, J. ;

Sugar, R. ;

Toussaint, D. ;

Van de Water, R. S. ;

Zhou, Ran .

PHYSICAL REVIEW D, 2014, 89 (11)

← 1 2 3 4 5 6 7 →

Combined analysis of semileptonic B decays to D and D*: R(D(*)), |Vcb|, and new physics

Combined analysis of semileptonic B decays to D and D: R(D()), |Vcb|, and new physics