Bayesian Analysis of Pentaquark Signals from CLAS Data

Journal Article · Fri Feb 08 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.052001· OSTI ID:21024709

Ireland, D G; McKinnon, B; Protopopescu, D; Donnelly, J; Hassall, N; Johnstone, J R; Kellie, J D; Livingston, K; Paterson, C; Rosner, G ^[1]; Ambrozewicz, P; Gonenc, A; Moteabbed, M ^[2]; Anghinolfi, M; Battaglieri, M; De Vita, R; Ricco, G; Ripani, M; Taiuti, M ^[3]; Asryan, G ^[4]

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1. University of Glasgow, Glasgow G12 8QQ (United Kingdom)
2. Florida International University, Miami, Florida 33199 (United States)
3. INFN, Sezione di Genova, 16146 Genova (Italy)
4. Yerevan Physics Institute, 375036 Yerevan (Armenia)

We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a {theta}{sup +} pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a {theta}{sup +}. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.

• OSTI ID: 21024709
• Journal Information: Physical Review Letters, Vol. 100, Issue 5; Other Information: DOI: 10.1103/PhysRevLett.100.052001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CLAS Collaboration; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DATA ANALYSIS
PARTICLE IDENTIFICATION
QUARKS
SIGNALS
TESTING