Nonperturbative calculations of form factors for exclusive semileptonic B(s) decays

Jonathan M. Flynn; Ryan C. Hill; Andreas Jüttner; Amarjit Soni; J. Tobias Tsang; Oliver Witzel

doi:10.22323/1.390.0436

Nonperturbative calculations of form factors for exclusive semileptonic B₍s₎ decays

Jonathan M. Flynn, Ryan C. Hill, Andreas Jüttner, Amarjit Soni, J. Tobias Tsang, Oliver Witzel^*

^*Corresponding author for this work

Department of Mathematics and Computer Science

Research output: Contribution to journal › Conference article › Research › peer-review

26 Downloads (Pure)

Abstract

Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the bquark make processes involving b quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic B₍s₎ decays. We present results from our determinations of B_s ? D_sl? and B_s ? Kl? semileptonic form factors and provide an outlook for our B ? pl? calculation. In addition we discuss the determination of R-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of 1/a = 1.78, 2.38, and 2.79 GeV. Heavy b-quarks are simulated using the relativistic heavy quark action.

Original language	English
Article number	436
Journal	Proceedings of Science
Volume	390
Number of pages	6
ISSN	1824-8039
DOIs	https://doi.org/10.22323/1.390.0436
Publication status	Published - Apr 2021
Event	40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic Duration: 28. Jul 2020 → 6. Aug 2020

Conference

Conference	40th International Conference on High Energy Physics, ICHEP 2020
Country/Territory	Czech Republic
City	Virtual, Prague
Period	28/07/2020 → 06/08/2020

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

Documents & Links

10.22323/1.390.0436Licence: CC BY-NC-ND

Open Access VersionFinal published version, 603 KBLicence: CC BY-NC-ND

Cite this

@inproceedings{6dc96547d9a74cd0bfae907e9042bbd0,

title = "Nonperturbative calculations of form factors for exclusive semileptonic B(s) decays",

abstract = "Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the bquark make processes involving b quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic B(s) decays. We present results from our determinations of Bs ? Dsl? and Bs ? Kl? semileptonic form factors and provide an outlook for our B ? pl? calculation. In addition we discuss the determination of R-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of 1/a = 1.78, 2.38, and 2.79 GeV. Heavy b-quarks are simulated using the relativistic heavy quark action.",

author = "Flynn, {Jonathan M.} and Hill, {Ryan C.} and Andreas J{\"u}ttner and Amarjit Soni and Tsang, {J. Tobias} and Oliver Witzel",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).; 40th International Conference on High Energy Physics, ICHEP 2020 ; Conference date: 28-07-2020 Through 06-08-2020",

year = "2021",

month = apr,

doi = "10.22323/1.390.0436",

language = "English",

volume = "390",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "SISSA",

}

TY - GEN

T1 - Nonperturbative calculations of form factors for exclusive semileptonic B(s) decays

AU - Flynn, Jonathan M.

AU - Hill, Ryan C.

AU - Jüttner, Andreas

AU - Soni, Amarjit

AU - Tsang, J. Tobias

AU - Witzel, Oliver

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

PY - 2021/4

Y1 - 2021/4

N2 - Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the bquark make processes involving b quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic B(s) decays. We present results from our determinations of Bs ? Dsl? and Bs ? Kl? semileptonic form factors and provide an outlook for our B ? pl? calculation. In addition we discuss the determination of R-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of 1/a = 1.78, 2.38, and 2.79 GeV. Heavy b-quarks are simulated using the relativistic heavy quark action.

AB - Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the bquark make processes involving b quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic B(s) decays. We present results from our determinations of Bs ? Dsl? and Bs ? Kl? semileptonic form factors and provide an outlook for our B ? pl? calculation. In addition we discuss the determination of R-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of 1/a = 1.78, 2.38, and 2.79 GeV. Heavy b-quarks are simulated using the relativistic heavy quark action.

U2 - 10.22323/1.390.0436

DO - 10.22323/1.390.0436

M3 - Conference article

AN - SCOPUS:85105492157

SN - 1824-8039

VL - 390

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 436

T2 - 40th International Conference on High Energy Physics, ICHEP 2020

Y2 - 28 July 2020 through 6 August 2020

ER -