Strong decays of charmed baryons in heavy hadron chiral perturbation theory

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.014006· OSTI ID:20933221

Cheng, H -Y ^[1]; Chua, C -K ^[2]

---

1. Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China)
2. Department of Physics, Chung Yuan Christian University, Chung-Li, Taiwan 320 (China)

Strong decays of charmed baryons are analyzed in the framework of heavy hadron chiral perturbation theory (HHChPT) in which heavy quark symmetry and chiral symmetry are synthesized. HHChPT works excellently for describing the strong decays of s-wave charmed baryons. For L=1 orbitally excited states, two of the unknown couplings, namely, h{sub 2} and h{sub 10}, are determined from the resonant {lambda}{sub c}{sup +}{pi}{pi} mode produced in the {lambda}{sub c}(2593) decay and the width of {sigma}{sub c}(2800), respectively. Predictions for the strong decays of the p-wave charmed baryon states {lambda}{sub c}(2625), {xi}{sub c}(2790) and {xi}{sub c}(2815) are presented. Since the decay {lambda}{sub c}(2593){sup +}{yields}{lambda}{sub c}{sup +}{pi}{pi} receives nonresonant contributions, our value for h{sub 2} is smaller than the previous estimates. We also discuss the first positive-parity excited charmed baryons. We conjecture that the charmed baryon {lambda}{sub c}(2880) with is an admixture of with an ; both are L=2 orbitally excited states. The potential model suggests or for {lambda}{sub c}(2940){sup +}. Measurements of the ratio of {sigma}{sub c}*{pi}/{sigma}{sub c}{pi} will enable us to discriminate the J{sup P} assignments for {lambda}{sub c}(2940). We advocate that the J{sup P} quantum numbers of {xi}{sub c}(2980) and {xi}{sub c}(3077) are and , respectively. Under this J{sup P} assignment, it is easy to understand why {xi}{sub c}(2980) is broader than {xi}{sub c}(3077)

• OSTI ID: 20933221
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
C QUARKS
CHIRAL SYMMETRY
CHIRALITY
EXCITED STATES
LAMBDA C PLUS BARYONS
P WAVES
PARITY
PARTICLE DECAY
PERTURBATION THEORY
QUANTUM NUMBERS
S WAVES
T QUARKS
XI BARYONS