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Title: Light-front holographic distribution amplitudes of pseudoscalar mesons and their application to B -meson decays

Journal Article · · Physical Review D
 [1];  [2];  [3]
  1. Henan Normal Univ. (China). Inst. of Particle and Nuclear Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Central China Normal University, Wuhan (China). Inst. of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE)

In this article the dynamical spin effects of the light-front holographic wave functions for light pseudoscalar mesons are studied. These improved wave functions are then confronted with a number of hadronic observables: the decay constants of π and K mesons, their ξ -moments, the pion-to-photon transition form factor, and the pure annihilation $$\bar{B}_s$$ → π+ π- and $$\bar{B}_d$$ → K+ K- decays. Taking fπ , fK , and their ratio fK / fπ as constraints, we perform a χ2 analysis for the holographic parameters, including the mass scale parameter $$\sqrtλ$$ and the effective quark masses, and find that the fitted results are quite consistent with the ones obtained from the light-quark hadronic Regge trajectories. In addition, we also show that the end point divergence appearing in the pure annihilation $$\bar{B}_s$$ → π+ π- and $$\bar{B}_d$$ → K+ K- decays can be controlled well by using these improved light-front holographic distribution amplitudes.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; National Natural Science Foundation of China (NNSFC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1369422
Report Number(s):
SLAC-PUB--16849
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 9 Vol. 95; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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