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Title: Charm hadrons from fragmentation and B decays in e{sup +}e{sup -} annihilation at {radical}(s)=10.6 GeV

Abstract

We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103 fb{sup -1} collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely D{sup 0},D{sup +},D{sub s}{sup +} and {lambda}{sub c}{sup +}, as well as the excited states D*{sup 0} and D*{sup +}. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the {upsilon}(4S) resonance and measure the distribution of their production angle in e{sup +}e{sup -} annihilation events and in B decays.

Authors:
; ; ; ;  [1]; ;  [2];  [3];  [4]; ; ; ; ;  [5]; ;  [6]; ; ; ;  [7]
  1. University of Hawaii, Honolulu, Hawaii 96822 (United States)
  2. Tohoku Gakuin University, Tagajo (Japan)
  3. Department of Physics, University of Tokyo, Tokyo (Japan)
  4. University of Tsukuba, Tsukuba (Japan)
  5. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
  6. University of Sydney, Sydney NSW (Australia)
  7. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation) (and others)
Publication Date:
OSTI Identifier:
20776631
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.73.032002; (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; ANNIHILATION; B MESONS; D NEUTRAL MESONS; D PLUS MESONS; D S MESONS; D*-2010 MESONS; DISTRIBUTION; ELECTROPRODUCTION; EXCITED STATES; GEV RANGE; GROUND STATES; HADRONIC PARTICLE DECAY; INCLUSIVE INTERACTIONS; LAMBDA C PLUS BARYONS; MONTE CARLO METHOD; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PERTURBATION THEORY; QUARKS; RESONANCE PARTICLES

Citation Formats

Seuster, R., Barbero, M., Fang, F., Olsen, S.L., Varner, G., Abe, K., Hoshi, Y., Aihara, H., Asano, Y., Aushev, T., Danilov, M., Mizuk, R., Pakhlov, P., Uglov, T., Bakich, A.M., Cole, S., Bedny, I., Eidelman, S., Krokovny, P., and Kuzmin, A. Charm hadrons from fragmentation and B decays in e{sup +}e{sup -} annihilation at {radical}(s)=10.6 GeV. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.032002.
Seuster, R., Barbero, M., Fang, F., Olsen, S.L., Varner, G., Abe, K., Hoshi, Y., Aihara, H., Asano, Y., Aushev, T., Danilov, M., Mizuk, R., Pakhlov, P., Uglov, T., Bakich, A.M., Cole, S., Bedny, I., Eidelman, S., Krokovny, P., & Kuzmin, A. Charm hadrons from fragmentation and B decays in e{sup +}e{sup -} annihilation at {radical}(s)=10.6 GeV. United States. doi:10.1103/PhysRevD.73.032002.
Seuster, R., Barbero, M., Fang, F., Olsen, S.L., Varner, G., Abe, K., Hoshi, Y., Aihara, H., Asano, Y., Aushev, T., Danilov, M., Mizuk, R., Pakhlov, P., Uglov, T., Bakich, A.M., Cole, S., Bedny, I., Eidelman, S., Krokovny, P., and Kuzmin, A. Wed . "Charm hadrons from fragmentation and B decays in e{sup +}e{sup -} annihilation at {radical}(s)=10.6 GeV". United States. doi:10.1103/PhysRevD.73.032002.
@article{osti_20776631,
title = {Charm hadrons from fragmentation and B decays in e{sup +}e{sup -} annihilation at {radical}(s)=10.6 GeV},
author = {Seuster, R. and Barbero, M. and Fang, F. and Olsen, S.L. and Varner, G. and Abe, K. and Hoshi, Y. and Aihara, H. and Asano, Y. and Aushev, T. and Danilov, M. and Mizuk, R. and Pakhlov, P. and Uglov, T. and Bakich, A.M. and Cole, S. and Bedny, I. and Eidelman, S. and Krokovny, P. and Kuzmin, A.},
abstractNote = {We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103 fb{sup -1} collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely D{sup 0},D{sup +},D{sub s}{sup +} and {lambda}{sub c}{sup +}, as well as the excited states D*{sup 0} and D*{sup +}. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the {upsilon}(4S) resonance and measure the distribution of their production angle in e{sup +}e{sup -} annihilation events and in B decays.},
doi = {10.1103/PhysRevD.73.032002},
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}
}
  • No abstract prepared.
  • New precise measurements of D{sub s}{sup +} and D*{sub s}{sup +} meson production from B mesons and q{bar q} continuum events near the {Upsilon}(4S) resonance are presented in this paper. Using the BABAR data recorded in 1999 and 2000 of 20.8 fb{sup -1} on-resonance and 2.6 fb{sup -1} off-resonance, we measure the inclusive branching fractions (B {yields} D{sub s}{sup +}) = (10.93 {+-} 0.19 {+-} 0.58 {+-} 2.73)% and (B {yields} D*{sub s}{sup +}) = (7.94 {+-} 0.82 {+-} 0.72 {+-} 1.99)%, where the first error is statistical, the second is the systematic error, and the third is the errormore » due to the D{sub s}{sup +} {yields} {pi}{sup +} branching fraction uncertainty. The branching fractions (B {yields} D{sup (*)}{sub s}{sup +} {bar D}(*)) = (5.07 {+-} 0.09 {+-} 0.34 {+-} 1.27)% and (B {yields} D*{sub s}{sup +} {bar D}(*)) = (4.07 {+-} 0.42 {+-} 0.53 {+-} 1.02)% have been determined from the measured D{sup (*)}{sub s}{sup +} momentum spectra.« less
  • We present a new analysis of double charmonium production in e{sup +}e{sup -} annihilation. The observation of the processes e{sup +}e{sup -}{yields}J/{psi}{eta}{sub c}, J/{psi}{chi}{sub c0}, and J/{psi}{eta}{sub c}(2S) is confirmed using a data set more than 3 times larger than that of Belle's previous report, and no evidence for the process e{sup +}e{sup -}{yields}J/{psi}J/{psi} is found. We perform an angular analysis for J/{psi}{eta}{sub c} production and set an upper limit on the production of J/{psi}J/{psi}. Processes of the type e{sup +}e{sup -}{yields}{psi}(2S)(cc){sub res} have been observed for the first time; their rates are found to be comparable to those ofmore » e{sup +}e{sup -}{yields}J/{psi}(cc){sub res} processes.« less
  • In this paper the production of excited vector and pseudoscalar charmonium mesons in e{sup +}e{sup -} annihilation is analyzed in the framework of the light cone. In particular the cross sections e{sup +}e{sup -}{yields}{psi}(2S){eta}{sub c}(1S),{psi}(1S){eta}{sub c}(2S),{psi}(2S){eta}{sub c}(2S) have been calculated. It is shown that contrary to NRQCD, the cross sections calculated in the framework of the light cone agree with experimental data.
  • We report the first observation of a charmoniumlike state recoiling from the J/{psi} in the inclusive process e{sup +}e{sup -}{yields}J/{psi}+anything at a mass of (3.943{+-}0.006{+-}0.006) GeV/c{sup 2}. We also observe the decay of this state into D*D and determine its intrinsic width to be less than 52 MeV/c{sup 2} at the 90% C.L. These results are obtained from a 357 fb{sup -1} data sample collected with the Belle detector near the {upsilon}(4S) resonance, at the KEKB asymmetric-energy e{sup +}e{sup -} collider.