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Title: Semileptonic decay of B and D{yields}K{sub 0}*(1430)l{nu} from QCD sum rule

Abstract

We calculate B{sub (s)} and D{sub (s)} to K{sub 0}*(1430) transition form factors, and study semileptonic decays of B{sub (s)} and D{sub (s)}{yields}K{sub 0}*(1430)l{nu} based on QCD sum rule. Measuring these semileptonic decays with high statistics will give valuable information on the nature of light scalar mesons.

Authors:
 [1];  [2]
  1. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
  2. (4), Beijing 100049 (China)
Publication Date:
OSTI Identifier:
20776669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.73.034027; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B S MESONS; D S MESONS; FORM FACTORS; K*-1410 MESONS; NEUTRINOS; QUANTUM CHROMODYNAMICS; SCALAR MESONS; SEMILEPTONIC DECAY; STATISTICS; SUM RULES

Citation Formats

Yang Maozhi, and and Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918. Semileptonic decay of B and D{yields}K{sub 0}*(1430)l{nu} from QCD sum rule. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.034027.
Yang Maozhi, & and Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918. Semileptonic decay of B and D{yields}K{sub 0}*(1430)l{nu} from QCD sum rule. United States. doi:10.1103/PhysRevD.73.034027.
Yang Maozhi, and and Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918. Wed . "Semileptonic decay of B and D{yields}K{sub 0}*(1430)l{nu} from QCD sum rule". United States. doi:10.1103/PhysRevD.73.034027.
@article{osti_20776669,
title = {Semileptonic decay of B and D{yields}K{sub 0}*(1430)l{nu} from QCD sum rule},
author = {Yang Maozhi and and Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918},
abstractNote = {We calculate B{sub (s)} and D{sub (s)} to K{sub 0}*(1430) transition form factors, and study semileptonic decays of B{sub (s)} and D{sub (s)}{yields}K{sub 0}*(1430)l{nu} based on QCD sum rule. Measuring these semileptonic decays with high statistics will give valuable information on the nature of light scalar mesons.},
doi = {10.1103/PhysRevD.73.034027},
journal = {Physical Review. D, Particles Fields},
number = 3,
volume = 73,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}
  • Form factors of rare B{yields}K{sub 0}*(1430)l{sup +}l{sup -} decay are calculated within three-point QCD sum rules, with K{sub 0}*(1430) being the p-wave scalar meson. The branching ratios are estimated when only short, as well as short and long distance effects, are taken into account. It is obtained that the B{yields}K{sub 0}*(1430)l{sup +}l{sup -} (l=e, {mu}) decay is measurable at LHC. Measurement of these branching ratios for the semileptonic rare B{yields}K{sub 0}*(1430)l{sup +}l{sup -} can give valuable information about the nature of scalar meson K{sub 0}*(1430)
  • We present a new calculation of the D{yields}{pi} and D{yields}K form factors from QCD light-cone sum rules. The MS scheme for the c-quark mass is used and the input parameters are updated. The results are f{sub D{pi}}{sup +}(0)=0.67{sub -0.07}{sup +0.10}, f{sub DK}{sup +}(0)=0.75{sub -0.08}{sup +0.11}, and f{sub D{pi}}{sup +}(0)/f{sub DK}{sup +}(0)=0.88{+-}0.05. Combining the calculated form factors with the latest CLEO data, we obtain |V{sub cd}|=0.225{+-}0.005{+-}0.003{sub -0.012}{sup +0.016} and |V{sub cd}|/|V{sub cs}|=0.236{+-}0.006{+-}0.003{+-}0.013 where the first and second errors are of experimental origin and the third error is due to the estimated uncertainties of our calculation. We also evaluate the form factorsmore » f{sub D{pi}}{sup -} and f{sub DK}{sup -} and predict the slope parameters at q{sup 2}=0. Furthermore, calculating the form factors from the sum rules at q{sup 2}<0, we fit them to various parametrizations. After analytic continuation, the shape of the D{yields}{pi}, K form factors in the whole semileptonic region is reproduced, in a good agreement with experiment.« less
  • Taking into account the gluon condensate contributions, the form factors of the semileptonic B{sub c}{sup -}{yields}D*{sup 0}l{nu} transition with l={tau}, e are calculated in the framework of the three-point QCD sum rules. The heavy quark effective theory limit of the form factors is also computed. The relevant total decay width as well as the branching ratio are evaluated and compared with the predictions of the other nonperturbative approaches.
  • Considering the gluon condensate corrections, the form factors relevant to the semileptonic rare B{sub c}{yields}D, D{sub s}(J{sup P}=0{sup -})l{sup +}l{sup -} with l={tau}, {mu}, e and B{sub c}{yields}D, D{sub s}(J{sup P}=0{sup -}){nu}{nu} transitions are calculated in the framework of the three point QCD sum rules. The heavy quark effective theory limit of the form factors is computed. The branching fraction of these decays is also evaluated and compared with the predictions of the relativistic constituent quark model. Analyzing such transitions could give useful information about the strong interactions inside the pseudoscalar D{sub s} meson and its structure.