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Title: Study of B{yields}ppK* and B{yields}pp{rho}

Abstract

We study the three-body baryonic B decays of B{yields}pp(K*,{rho}) in the standard model. The baryonic matrix elements are calculated in terms of the SU(3) flavor symmetry and the QCD power counting rules within the perturbative QCD. We find that the decay branching ratios, angular, and direct CP asymmetries of (B{sup -}{yields}ppK*{sup -}, B{sup 0}{yields}ppK*{sup 0}, B{sup -}{yields}pp{rho}{sup -}) are around (6,1,30)x10{sup -6}, (13,-27,11)%, and (22,1,-3)%, which are consistent with the current BABAR and Belle data, respectively. The large values of the branching ratio in B{sup -}{yields}pp{rho}{sup -} and the direct CP asymmetry in B{sup {+-}}{yields}ppK*{sup {+-}} are useful to test the standard model and search for new physics.

Authors:
;  [1];  [2];  [3]
  1. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 300 (China)
  2. (Canada)
  3. Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. (Canada)
Publication Date:
OSTI Identifier:
21020485
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.75.094013; (c) 2007 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; ASYMMETRY; B MESONS; BRANCHING RATIO; CP INVARIANCE; HADRONIC PARTICLE DECAY; K*-892 MESONS; MATRIX ELEMENTS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PERTURBATION THEORY; PROTONS; QUANTUM CHROMODYNAMICS; RHO-770 MESONS; STANDARD MODEL; SU-3 GROUPS; SYMMETRY; THREE-BODY PROBLEM

Citation Formats

Geng, C. Q., Hsiao, Y. K., Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., and Ng, J. N. Study of B{yields}ppK* and B{yields}pp{rho}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.094013.
Geng, C. Q., Hsiao, Y. K., Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., & Ng, J. N. Study of B{yields}ppK* and B{yields}pp{rho}. United States. doi:10.1103/PHYSREVD.75.094013.
Geng, C. Q., Hsiao, Y. K., Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., and Ng, J. N. Tue . "Study of B{yields}ppK* and B{yields}pp{rho}". United States. doi:10.1103/PHYSREVD.75.094013.
@article{osti_21020485,
title = {Study of B{yields}ppK* and B{yields}pp{rho}},
author = {Geng, C. Q. and Hsiao, Y. K. and Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. and Ng, J. N.},
abstractNote = {We study the three-body baryonic B decays of B{yields}pp(K*,{rho}) in the standard model. The baryonic matrix elements are calculated in terms of the SU(3) flavor symmetry and the QCD power counting rules within the perturbative QCD. We find that the decay branching ratios, angular, and direct CP asymmetries of (B{sup -}{yields}ppK*{sup -}, B{sup 0}{yields}ppK*{sup 0}, B{sup -}{yields}pp{rho}{sup -}) are around (6,1,30)x10{sup -6}, (13,-27,11)%, and (22,1,-3)%, which are consistent with the current BABAR and Belle data, respectively. The large values of the branching ratio in B{sup -}{yields}pp{rho}{sup -} and the direct CP asymmetry in B{sup {+-}}{yields}ppK*{sup {+-}} are useful to test the standard model and search for new physics.},
doi = {10.1103/PHYSREVD.75.094013},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 75,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}
  • With a sample of 232x10{sup 6} {upsilon}(4S){yields}BB events collected with the BABAR detector, we study the decays of B mesons to pph final states, where h={pi}{sup +}, K{sub S}{sup 0}, K*{sup 0}, or K*{sup +}. We report evidence for the B{sup 0}{yields}ppK*{sup 0} decay, with a branching fraction (1.47{+-}0.45(stat){+-}0.40(syst))x10{sup -6}, and for the B{sup +}{yields}{eta}{sub c}K*{sup +} decay, with the branching fraction of B(B{sup +}{yields}{eta}{sub c}K*{sup +})xB({eta}{sub c}{yields}pp)=(1.57{sub -0.45}{sup +0.56}(stat){sub -0.3}={sub 6}{sup +0.46}(syst))x10{sup -6}, and provide improved measurements of the branching fractions of the other modes of this type. We also report the measurements of the charge asymmetry consistent withmore » zero in the B{sup +}{yields}pp{pi}{sup +}, B{sup 0}{yields}ppK*{sup 0}, and B{sup +}{yields}ppK*{sup +} modes. No evidence is found for the pentaquark candidate {theta}{sup +} in the mass range 1.52 to 1.55 GeV/c{sup 2}, decaying into pK{sub S}{sup 0}, or the glueball candidate f{sub J}(2220) in the mass range 2.2<m{sub pp}<2.4 GeV/c{sup 2}, and branching fraction limits are established for both at the 10{sup -7} level.« less
  • With a sample of 232x10{sup 6} {upsilon}(4S){yields}BB events collected with the BABAR detector, we study the decay B{sup +}{yields}ppK{sup +} excluding charmonium decays to pp. We measure a branching fraction B(B{sup +}{yields}ppK{sup +})=(6.7{+-}0.5{+-}0.4)x10{sup -6}. An enhancement at low pp mass is observed and the Dalitz plot asymmetry suggests dominance of the penguin amplitude in this B decay. We search for a pentaquark candidate {theta}*{sup ++} decaying into pK{sup +} in the mass range 1.43 to 2.00 GeV/c{sup 2} and set limits on B(B{sup +}{yields}{theta}*{sup ++}p)xB({theta}*{sup ++}{yields}pK{sup +}) at the 10{sup -7} level.
  • The excitation function for the pp{yields}ppK{sup +}K{sup -} reaction revealed a significant enhancement close to threshold that may plausibly be assigned to the influence of the pK{sup -} and K{sup +}K{sup -} final-state interactions. In an improved reanalysis of COSY-11 data for the pp{yields}ppK{sup +}K{sup -} reaction at excess energies of Q=10 and 28 MeV, including the proton-K{sup -} interaction, the enhancement is confirmed. Invariant mass distributions for the two- and three-particle subsystems allow us to test at low excess energies the ansatz and parameters for the description of the interaction in the ppK{sup +}K{sup -} system as derived frommore » the COSY-ANKE data. Finally, based for the first time on the low-energy K{sup +}K{sup -} invariant mass distributions and the generalized Dalitz plot analysis, we estimate the scattering length for the K{sup +}K{sup -} interaction to be |Re(a{sub K{sup +}}{sub K{sup -}})|=0.5{sub -0.5}{sup +4.0} fm and Im(a{sub K{sup +}}{sub K{sup -}})=3.0{+-}3.0 fm.« less
  • In the two-quark model supposition for f{sub 0}(980) and K{sub 0}{sup *}(1430), the branching ratios and the direct CP-violating asymmetries for decays B{sup 0}{yields}f{sub 0}(980){rho}{sup 0}({omega}, {phi}), K{sub 0}{sup *0}(1430){rho}{sup 0}({omega}), K{sub 0}{sup *-}(1430){rho}{sup +} and B{sup -}{yields}f{sub 0}(980){rho}{sup -}, K{sub 0}{sup *0}(1430){rho}{sup -}, K{sub 0}{sup *-}(1430){rho}{sup 0}({omega}) are studied by employing the perturbative QCD factorization approach. we find the following results: (a) if the scalar meson f{sub 0}(980) is viewed as a mixture of ss and (uu+dd)/{radical}(2), the branching ratios of the b{yields}d transition processes B{sup 0}{yields}f{sub 0}(980){rho}{sup 0}({omega},{phi}) and B{sup -}{yields}f{sub 0}(980){rho}{sup -} are smaller than the currentlymore » experimental upper limits, and the predictions for the decays B{sup 0}{yields}f{sub 0}(980){omega}, B{sup -}{yields}f{sub 0}(980){rho}{sup -} are not far away from their limits; (b) in the b{yields}s transition processes B{yields}K{sub 0}{sup *}(1430){rho}({omega}), the branching ratio of B{sup 0}{yields}K{sub 0}{sup *0}(1430){rho}{sup 0} is the smallest one, at the order of 10{sup -7} by treating K{sub 0}{sup *}(1430) as the lowest lying state, about 4.8x10{sup -6} by considering K{sub 0}{sup *}(1430) as the first excited state; (c) the direct CP-violating asymmetries of decays B{yields}f{sub 0}(980){rho}({omega}) have a strong dependence on the mixing angle {theta}: they are large in the range of 25 degree sign <{theta}<40 degree sign , and small in the range of 140 degree sign <{theta}<165 degree sign , while the direct CP-violating asymmetry amplitudes of decays B{yields}K{sub 0}{sup *}(1430){rho}({omega}) are not large in the two kinds of state supposition for K{sub 0}{sup *}(1430) and most of them are less than 20%.« less
  • We present measurements of branching fractions of B{sup 0} decays to multibody final states containing protons, based on 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the branching fractions B(B{sup 0}{yields}D{sup 0}pp)=(1.13{+-}0.06{+-}0.08)x10{sup -4}, B(B{sup 0}{yields}D*{sup 0}pp)=(1.01{+-}0.10{+-}0.09)x10{sup -4}, B(B{sup 0}{yields}D{sup -}pp{pi}{sup +})=(3.38{+-}0.14{+-}0.29)x10{sup -4}, and B(B{sup 0}{yields}D*{sup -}pp{pi}{sup +})=(4.81{+-}0.22{+-}0.44)x10{sup -4} where the first error is statistical and the second systematic. We present a search for the charmed pentaquark state, {theta}{sub c}(3100) observed by H1 and put limits on the branching fraction B(B{sup 0}{yields}{theta}{sub c}p{pi}{sup +})xB({theta}{sub c}{yields}D*{sup -}p)<14x10{sup -6} and B(B{sup 0}{yields}{theta}{sub c}p{pi}{supmore » +})xB({theta}{sub c}{yields}D{sup -}p)<9x10{sup -6}. Upon investigation of the decay structure of the above four B{sup 0} decay modes, we see an enhancement at low pp mass and deviations from phase-space in the Dp and Dp invariant mass spectra.« less