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Title: Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states

Abstract

A high-resolution ({sigma}{sub instr.}=1.5 MeV) search for narrow states ({gamma}<10 MeV) with masses of M{sub x}{approx_equal}1500-1850 MeV in ep{yields}e{sup '}K{sup +}X,e{sup '}K{sup -}X, and e{sup '}{pi}{sup +}X electroproduction at small angles and low Q{sup 2} was performed. These states would be candidate partner states of the reported {theta}{sup +}(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the {lambda}(1520) production cross section, depending on the channel and the assumed mass and width of the state.

Authors:
; ; ; ;  [1]; ;  [2]; ; ; ;  [3];  [4]; ; ; ; ;  [5]; ; ;  [6]
  1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  2. University of Glasgow, Glasgow, Scotland (United Kingdom)
  3. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  4. Nuclear Physics Institute, St. Petersburg RU-188300 (Russian Federation)
  5. Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)
  6. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States) (and others)
Publication Date:
OSTI Identifier:
20995325
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.055208; (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; ELECTROPRODUCTION; LAMBDA-1520 BARYONS; MASS; MEV RANGE; RESOLUTION

Citation Formats

Qiang, Y., Bertozzi, W., Gayou, O., Monaghan, P., Suleiman, R., Annand, J., Hamilton, D. J., Arrington, J., Reimer, P. E., Schulte, E., Zheng, X., Azimov, Ya. I., Cates, G., Lindgren, R., Liyanage, N., Nelyubin, V., Singh, J., Chen, J. P., Chudakov, E., and Jager, C. W. de. Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.055208.
Qiang, Y., Bertozzi, W., Gayou, O., Monaghan, P., Suleiman, R., Annand, J., Hamilton, D. J., Arrington, J., Reimer, P. E., Schulte, E., Zheng, X., Azimov, Ya. I., Cates, G., Lindgren, R., Liyanage, N., Nelyubin, V., Singh, J., Chen, J. P., Chudakov, E., & Jager, C. W. de. Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states. United States. doi:10.1103/PHYSREVC.75.055208.
Qiang, Y., Bertozzi, W., Gayou, O., Monaghan, P., Suleiman, R., Annand, J., Hamilton, D. J., Arrington, J., Reimer, P. E., Schulte, E., Zheng, X., Azimov, Ya. I., Cates, G., Lindgren, R., Liyanage, N., Nelyubin, V., Singh, J., Chen, J. P., Chudakov, E., and Jager, C. W. de. Tue . "Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states". United States. doi:10.1103/PHYSREVC.75.055208.
@article{osti_20995325,
title = {Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states},
author = {Qiang, Y. and Bertozzi, W. and Gayou, O. and Monaghan, P. and Suleiman, R. and Annand, J. and Hamilton, D. J. and Arrington, J. and Reimer, P. E. and Schulte, E. and Zheng, X. and Azimov, Ya. I. and Cates, G. and Lindgren, R. and Liyanage, N. and Nelyubin, V. and Singh, J. and Chen, J. P. and Chudakov, E. and Jager, C. W. de},
abstractNote = {A high-resolution ({sigma}{sub instr.}=1.5 MeV) search for narrow states ({gamma}<10 MeV) with masses of M{sub x}{approx_equal}1500-1850 MeV in ep{yields}e{sup '}K{sup +}X,e{sup '}K{sup -}X, and e{sup '}{pi}{sup +}X electroproduction at small angles and low Q{sup 2} was performed. These states would be candidate partner states of the reported {theta}{sup +}(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the {lambda}(1520) production cross section, depending on the channel and the assumed mass and width of the state.},
doi = {10.1103/PHYSREVC.75.055208},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}