B → πll Form Factors for New Physics Searches from Lattice QCD

被引：47

作者：

Bailey, Jon A. ^{[1
]}

Bazavov, A. ^{[2
]}

Bernard, C. ^{[3
]}

Bouchard, C. M. ^{[4
]}

DeTar, C. ^{[5
]}

Du, Daping ^{[6
]}

El-Khadra, A. X. ^{[7
]}

Freeland, E. D. ^{[8
]}

Gamiz, E. ^{[9
,10
]}

Gottlieb, Steven ^{[11
]}

Heller, U. M. ^{[12
]}

Kronfeld, A. S. ^{[13
,14
]}

Laiho, J. ^{[6
]}

Levkova, L. ^{[5
]}

Liu, Yuzhi ^{[15
]}

Lunghi, E. ^{[11
]}

Mackenzie, P. B. ^{[13
]}

Meurice, Y. ^{[2
]}

Neil, E. ^{[15
,16
]}

Qiu, Si-Wei ^{[5
]}

Simone, J. N. ^{[13
]}

Sugar, R. ^{[17
]}

Toussaint, D. ^{[18
]}

Van de Water, R. S. ^{[13
]}

Zhou, Ran ^{[13
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[2] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[3] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[4] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[5] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[6] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[7] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[8] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA

[9] Univ Granada, CAFPE, E-18002 Granada, Spain

[10] Univ Granada, Dept Fis Teor & Cosmos, E-18002 Granada, Spain

[11] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[12] Amer Phys Soc, Ridge, NY 11961 USA

[13] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[14] Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany

[15] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[16] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA

[17] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[18] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 15期

基金：

美国国家科学基金会; 新加坡国家研究基金会; 美国能源部;

关键词：

SYMMETRY-BREAKING CORRECTIONS; CP VIOLATION; DECAYS; HEAVY; FACTORIZATION; RARE;

D O I：

10.1103/PhysRevLett.115.152002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The rare decay B -> pi l(+) l(-) arises from b -> d flavor-changing neutral currents and could be sensitive to physics beyond the standard model. Here, we present the first ab initio QCD calculation of the B -> pi tensor form factor f(T). Together with the vector and scalar form factors f(+) and f(0) from our companion work [J. A. Bailey et al., Phys. Rev. D 92, 014024 (2015)], these parametrize the hadronic contribution to B -> pi semileptonic decays in any extension of the standard model. We obtain the total branching ratio BR(B+ -> pi(+) mu(+) mu(-)) = 20.4(2.1) x 10(-9) in the standard model, which is the most precise theoretical determination to date, and agrees with the recent measurement from the LHCb experiment [R. Aaij et al., J. High Energy Phys. 12 (2012) 125].

引用

页数：7

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