N to {delta} transition amplitudes from QCD sum rules

Journal Article · Sat Aug 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.034003· OSTI ID:21322332

Lai, Wang; Lee, Frank X ^[1]

---

1. Physics Department, The George Washington University, Washington, D.C. 20052 (United States)

We present a calculation of the N to {delta} electromagnetic transition amplitudes using the method of QCD sum rules. A complete set of QCD sum rules is derived for the entire family of transitions from the baryon octet to decuplet. They are analyzed in conjunction with the corresponding mass sum rules using a Monte Carlo-based analysis procedure. The performance of each of the sum rules is examined using the criteria of operator product expansion convergence and ground-state dominance, along with the role of the transitions in intermediate states. Individual contributions from the u, d, and s quarks are isolated and their implications in the underlying dynamics are explored. Valid sum rules are identified and their predictions are obtained. The results are compared with experiment and other calculations.

• OSTI ID: 21322332
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON OCTETS
COMPUTERIZED SIMULATION
CONVERGENCE
ENERGY-LEVEL TRANSITIONS
FORECASTING
GROUND STATES
INTERMEDIATE STATE
MASS
MONTE CARLO METHOD
OPERATOR PRODUCT EXPANSION
QUANTUM CHROMODYNAMICS
S QUARKS
SUM RULES
TRANSITION AMPLITUDES