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Title: Precision model-independent bounds from a global analysis of b → c ℓ ν form factors form factors

Journal Article · · Physical Review D
 [1]; ORCiD logo [1];  [2]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
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We present a model-independent global analysis of hadronic form factors for the semileptonic decays b → c ℓ ν that exploits lattice-QCD data, dispersion relations, and heavy-quark symmetries. The analysis yields predictions for the relevant form factors, within quantifiable bounds. These form factors are used to compute the semileptonic ratios $$R(H_c)$$ and various decay-product polarizations. In particular, we find $$R(D^{\ast}_s)$$ = 0.20(3) and $$R(J/\psi)$$ = 0.25(3), predictions that can be compared to results of upcoming LHCb measurements. In developing this treatment, we obtain leading-order nonrelativistic QCD results for the nonzero-recoil relations between the $$B^+_c → \{J/\psi, η_c\}$$ form factors.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
FG02-93ER40762; PHY-1803912; FG02-93ER-40762
OSTI ID:
1574071
Alternate ID(s):
OSTI ID: 1800785
Journal Information:
Physical Review D, Vol. 100, Issue 9; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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