|
|||||
|
|
Search for Theta+ (1540) Pentaquark in High-Statistics Measurement of gammap-->K0K+n at CLAS |
|
| Authors: | Battaglieri M De Vita R Kubarovsky V Guo L Mutchler G S Stoler P Weygand D P Ambrozewicz P Anghinolfi M Asryan G Avakian H Bagdasaryan H Baillie N Ball J P Baltzell N A Batourine V Bedlinskiy I Bellis M Benmouna N Berman B L Biselli A S Bouchigny S Boiarinov S Bradford R Branford D Briscoe W J Brooks W K Bültmann S Burkert V D Butuceanu C Calarco J R Careccia S L Carman D S Chen S Clinton E Cole P L Coltharp P Crabb D Crannell H Cummings J P Dale D De Sanctis E Degtyarenko P V Deur A Dharmawardane K V Djalali C Dodge G E Donnelly J Doughty D Dugger M Dzyubak O P Egiyan H Egiyan K S |
| Institution: | Istituto Nazionale di Fisica Nucleare, Sezione di Genova, and Dipartimento di Fisica, Universitá di Genova, 16146 Genova, Italy. |
| Abstract: | The exclusive reaction gammap-->K0K+n was studied in the photon energy range between 1.6 and 3.8 GeV searching for evidence of the exotic baryon Theta+ (1540)-->nK+. The decay to nK+requires the assignment of strangeness S=+1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb-1. No evidence for the Theta+ pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK+ mass. The 95% C.L. upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |