I. Theorie/Theory Current Algebra, PCAC, Its Anomaly, and the Two-Photon Process (Soft-Pion Production by Two Photons)

Journal Article · Fri Mar 01 00:00:00 EDT 1974 · Journal de Physique, Colloque

DOI:https://doi.org/10.1051/jphyscol:1974209· OSTI ID:1442901

Terazawa, H. ^[1]

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1. Stanford Univ., Stanford, CA (United States); The Rockefeller Univ., New York, NY (United States)

Here, various applications of the current algebra, PCAC (partially conserved axialvetor current hypothesis) and its anomaly to the hadron production by two photons γ + γ → hadrons are reviewed. They include the processes (1) γ + γ → π⁰, η, η' (or X⁰) and ε (2) γ + γ → 3 π⁰, π⁺ + π^- + π⁰, and (3) γ + γ → nπ⁺ + nπ^- (n = 1, 2, 3, ...), where all produced pions are soft. Asymptotic behavoir of the processus (4) γ* + γ* → π⁺ + π^- and (5) γ* + γ* → π⁰ for highly virtual photons is also discussed.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-76SF00515
• OSTI ID: 1442901
• Report Number(s): SLAC-PUB-1291; TRN: US1900945
• Journal Information: Journal de Physique, Colloque, Vol. 35, Issue C2; ISSN 0449-1947
• Publisher: EDP Sciences
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS