Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mi>Σ</mml:mi><mml:mrow><mml:mn>5</mml:mn></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup><mml:mo>,</mml:mo><mml:msubsup><mml:mi>N</mml:mi><mml:mrow><mml:mn>5</mml:mn></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>, and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>Θ</mml:mi><mml:mrow><mml:mo>+</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>pentaquark states

200710 citationsJournal Articlegreen Open Access

Authors

Y. Qiang · Massachusetts Institute of Technology

J. R. M. Annand · University of Glasgow

J. Arrington · Argonne National Laboratory

Ya. I. Azimov

W. Bertozzi · Massachusetts Institute of Technology

G. D. Cates · University of Virginia

J. P. Chen · Thomas Jefferson National Accelerator Facility

Abstract

A high-resolution (sigma_instr. = 1.5 MeV) search for narrow states (Gamma < 10 MeV) with masses of M_x approx 1500-1850 MeV in ep -> e'K^+ X, e'K^- X and e' pi^+ X electroproduction at small angles and low Q^2 was performed. These states would be candidate partner states of the reported Theta^+(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 0.7% and 4.2% of the Lambda(1520) production cross section, depending on the channel and the assumed mass and width of the state.

Topics & Keywords

Quantum Chromodynamics and Particle Interactions Particle physics theoretical and experimental studies Black Holes and Theoretical Physics

Publication Details

Published in: Physical Review C

Volume 75, Issue 5

DOI: 10.1103/physrevc.75.055208

Field-Weighted Citation Impact: 2.28

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Publication Details