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Title: Antideuteron production in {upsilon}(nS) decays and the nearby continuum

Abstract

Using CLEO data, we study the production of the antideuteron, d, in {upsilon}(nS) resonance decays and the nearby continuum. The branching ratios obtained are B{sup dir}({upsilon}(1S){yields}dX)=(3.36{+-}0.23{+-}0.25)x10{sup -5}, B({upsilon}(1S){yields}dX)=(2.86{+-}0.19{+-}0.21)x10{sup -5}, and B({upsilon}(2S){yields}dX)=(3.37{+-}0.50{+-}0.25)x10{sup -5}, where the 'dir' superscript indicates that decays produced via reannihilation of the bb pair to a {gamma}* are removed from both the signal and the normalizing number of {upsilon}(1S) decays in order to isolate direct decays of the {upsilon}(1S) to ggg, gg{gamma}. Upper limits at 90% C.L. are given for B({upsilon}(4S){yields}dX)<1.3x10{sup -5}, and continuum production {sigma}(e{sup +}e{sup -}{yields}dX)<0.031 pb. The {upsilon}(2S) data is also used to extract a limit on {chi}{sub bJ}{yields}dX. The results indicate enhanced deuteron production in ggg, gg{gamma} hadronization compared to {gamma}*{yields}qq. Baryon number compensation is also investigated with the large {upsilon}(1S){yields}dX sample.

Authors:
;  [1]; ; ; ; ; ;  [2];  [3]; ; ; ; ; ; ; ; ; ; ;  [4]
  1. Carleton University, Ottawa, Ontario, K1S 5B6 (Canada)
  2. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
  3. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
  4. Cornell University, Ithaca, New York 14853 (United States) (and others)
Publication Date:
OSTI Identifier:
20933202
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.75.012009; (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; ANNIHILATION; BARYON NUMBER; BRANCHING RATIO; CESR STORAGE RING; DEUTERONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; MULTIPARTICLE SPECTROMETERS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; POSITRONS

Citation Formats

Asner, D. M., Edwards, K. W., Briere, R. A., Chen, J., Ferguson, T., Tatishvili, G., Vogel, H., Watkins, M. E., Rosner, J. L., Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Galik, R. S., Gibbons, L., and Gray, R. Antideuteron production in {upsilon}(nS) decays and the nearby continuum. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.012009.
Asner, D. M., Edwards, K. W., Briere, R. A., Chen, J., Ferguson, T., Tatishvili, G., Vogel, H., Watkins, M. E., Rosner, J. L., Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Galik, R. S., Gibbons, L., & Gray, R. Antideuteron production in {upsilon}(nS) decays and the nearby continuum. United States. doi:10.1103/PHYSREVD.75.012009.
Asner, D. M., Edwards, K. W., Briere, R. A., Chen, J., Ferguson, T., Tatishvili, G., Vogel, H., Watkins, M. E., Rosner, J. L., Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Fields, L., Galik, R. S., Gibbons, L., and Gray, R. Mon . "Antideuteron production in {upsilon}(nS) decays and the nearby continuum". United States. doi:10.1103/PHYSREVD.75.012009.
@article{osti_20933202,
title = {Antideuteron production in {upsilon}(nS) decays and the nearby continuum},
author = {Asner, D. M. and Edwards, K. W. and Briere, R. A. and Chen, J. and Ferguson, T. and Tatishvili, G. and Vogel, H. and Watkins, M. E. and Rosner, J. L. and Adam, N. E. and Alexander, J. P. and Berkelman, K. and Cassel, D. G. and Duboscq, J. E. and Ecklund, K. M. and Ehrlich, R. and Fields, L. and Galik, R. S. and Gibbons, L. and Gray, R.},
abstractNote = {Using CLEO data, we study the production of the antideuteron, d, in {upsilon}(nS) resonance decays and the nearby continuum. The branching ratios obtained are B{sup dir}({upsilon}(1S){yields}dX)=(3.36{+-}0.23{+-}0.25)x10{sup -5}, B({upsilon}(1S){yields}dX)=(2.86{+-}0.19{+-}0.21)x10{sup -5}, and B({upsilon}(2S){yields}dX)=(3.37{+-}0.50{+-}0.25)x10{sup -5}, where the 'dir' superscript indicates that decays produced via reannihilation of the bb pair to a {gamma}* are removed from both the signal and the normalizing number of {upsilon}(1S) decays in order to isolate direct decays of the {upsilon}(1S) to ggg, gg{gamma}. Upper limits at 90% C.L. are given for B({upsilon}(4S){yields}dX)<1.3x10{sup -5}, and continuum production {sigma}(e{sup +}e{sup -}{yields}dX)<0.031 pb. The {upsilon}(2S) data is also used to extract a limit on {chi}{sub bJ}{yields}dX. The results indicate enhanced deuteron production in ggg, gg{gamma} hadronization compared to {gamma}*{yields}qq. Baryon number compensation is also investigated with the large {upsilon}(1S){yields}dX sample.},
doi = {10.1103/PHYSREVD.75.012009},
journal = {Physical Review. D, Particles Fields},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}