Radiative corrections on the B{yields}P form factors with chiral current in the light-cone sum rules

Journal Article · Sun Feb 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.034013· OSTI ID:21259899

Xinggang, Wu ^[1]; Tao, Huang ^[2]

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1. Department of Physics, Chongqing University, Chongqing 400030 (China)
2. Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049 (China)

Based on the approach of the vector form factor F{sub B{yields}}{sub {pi}}{sub ,K}{sup +}(q{sup 2}) in our previous papers, we extend the calculation of the radiative corrections to the B{yields}P (P stands {pi}, K, and all light pseudoscalar mesons) scalar and tensor form factors F{sub B{yields}}{sub P}{sup 0,T}(q{sup 2}) with chiral current in the light-cone sum rules (LCSRs). The most uncertain twist-3 contributions to the B{yields}P form factors can be naturally eliminated through a properly designed correlator. We present the next-leading-order formulas of F{sub B{yields}}{sub P}{sup +,0,T}(q{sup 2}) with the b-quark pole mass that is universal. It has been shown that our results are simpler and less uncertain under the same parameter regions since we only need to calculate the next-leading order on the twist-2 part from the obtained LCSR. Second, we obtain f{sub B{yields}}{sub {pi}}{sup +,0}(0)=0.260{sub -0.040}{sup +0.059}, f{sub B{yields}}{sub {pi}}{sup T}(0)=0.276{sub -0.039}{sup +0.052}, f{sub B{yields}}{sub K}{sup +,0}(0)=0.334{sub -0.069}{sup +0.094}, and f{sub B{yields}}{sub K}{sup T}(0)=0.379{sub -0.077}{sup +0.092} at q{sup 2}=0 and the SU{sub f}(3)-breaking effects are discussed too.

• OSTI ID: 21259899
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
CHIRALITY
FORM FACTORS
LIGHT CONE
MASS
PSEUDOSCALAR MESONS
RADIATIVE CORRECTIONS
SUM RULES