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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:
Heavy Quark Physics; Quark Masses and SM Parameters; Lattice QCD; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Cohen, Thomas D., Lamm, Henry, and Lebed, Richard F. Model-independent bounds on R(J/ψ). United States: N. p., 2018. Web. doi:10.1007/jhep09(2018)168.
Cohen, Thomas D., Lamm, Henry, & Lebed, Richard F. Model-independent bounds on R(J/ψ). United States. doi:10.1007/jhep09(2018)168.
Cohen, Thomas D., Lamm, Henry, and Lebed, Richard F. Sat . "Model-independent bounds on R(J/ψ)". United States. doi: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: 10 works
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Works referenced in this record:

R(D∗), |Vcb|, and the Heavy Quark Symmetry relations between form factors
journal, November 2017

  • Bigi, Dante; Gambino, Paolo; Schacht, Stefan
  • Journal of High Energy Physics, Vol. 2017, Issue 11
  • DOI: 10.1007/JHEP11(2017)061

Extraction of |Vcb| from B → D(∗)ℓνℓ and the Standard Model predictions of R(D(∗))
journal, December 2017

  • Jaiswal, Sneha; Nandi, Soumitra; Patra, Sunando Kumar
  • Journal of High Energy Physics, Vol. 2017, Issue 12
  • DOI: 10.1007/JHEP12(2017)060

Semileptonic decays of the B c meson
journal, March 2001


Semileptonic decays of $$B_c$$ B c meson to S-wave charmonium states in the perturbative QCD approach
journal, October 2016


New physics effect on B c J / ψ τ ν ¯ in relation to the R D ( ) anomaly
journal, January 2018


The decays B c J / ψ + ¯ ν and B → J/ψ + π(K) in covariant confined quark model
journal, August 2018


Leptonic and semileptonic decays of charm and bottom hadrons
journal, October 1995


Weak decays of heavy mesons in the static quark approximation
journal, November 1989


Weak transition form factors between heavy mesons
journal, March 1990


Semileptonic Bc decay and heavy quark spin symmetry
journal, February 1993


Heavy meson form factors from QCD
journal, October 1990


Precision corrections to dispersive bounds on form factors
journal, December 1997

  • Boyd, C. Glenn; Grinstein, Benjamín; Lebed, Richard F.
  • Physical Review D, Vol. 56, Issue 11
  • DOI: 10.1103/PhysRevD.56.6895

New exact heavy quark sum rules
journal, March 2001


Constraints on Form Factors for Exclusive Semileptonic Heavy to Light Meson Decays
journal, June 1995


QCD sum rules I: Perturbative results for current correlators
journal, June 1990


QCD contribution to vacuum polarization: The pseudoscalar unequal mass case
journal, December 1980


Two-point functions for flavour changing currents in QCD
journal, July 1981


Hadron properties from QCD sum rules
journal, October 1985


Mesons with beauty and charm: Spectroscopy
journal, June 1994