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Title: Model-independent bounds on R(J/ψ)

Abstract

We present a model-independent bound on R(J/ψ)≡BR(B+C→J/ψτ+ντ)/BR(B+C→J/ψμ+νμ) . This bound is constructed by constraining the form factors through a combination of dispersive relations, heavy-quark relations at zero-recoil, and the limited existing determinations from lattice QCD. The resulting 95% confidence-level bound, 0.20 ≤ R(J/ψ) ≤ 0.39, agrees with the recent LHCb result at 1.3σ, and rules out some previously suggested model form factors.

Authors:
 [1];  [1];  [2]
  1. Univ. of Maryland, College Park, MD (United States). Dept. of Physics
  2. Arizona State Univ., Tempe, AZ (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1507419
Alternate Identifier(s):
OSTI ID: 1507417
Grant/Contract Number:  
FG02-93ER40762; PHY-140389
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Heavy Quark Physics; Quark Masses and SM Parameters; Lattice QCD

Citation Formats

Cohen, Thomas D., Lamm, Henry, and Lebed, Richard F. Model-independent bounds on R(J/ψ). United States: N. p., 2018. Web. https://doi.org/10.1007/jhep09(2018)168.
Cohen, Thomas D., Lamm, Henry, & Lebed, Richard F. Model-independent bounds on R(J/ψ). United States. https://doi.org/10.1007/jhep09(2018)168
Cohen, Thomas D., Lamm, Henry, and Lebed, Richard F. Fri . "Model-independent bounds on R(J/ψ)". United States. https://doi.org/10.1007/jhep09(2018)168. https://www.osti.gov/servlets/purl/1507419.
@article{osti_1507419,
title = {Model-independent bounds on R(J/ψ)},
author = {Cohen, Thomas D. and Lamm, Henry and Lebed, Richard F.},
abstractNote = {We present a model-independent bound on R(J/ψ)≡BR(B+C→J/ψτ+ντ)/BR(B+C→J/ψμ+νμ) . This bound is constructed by constraining the form factors through a combination of dispersive relations, heavy-quark relations at zero-recoil, and the limited existing determinations from lattice QCD. The resulting 95% confidence-level bound, 0.20 ≤ R(J/ψ) ≤ 0.39, agrees with the recent LHCb result at 1.3σ, and rules out some previously suggested model form factors.},
doi = {10.1007/jhep09(2018)168},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2018,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 16 works
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