Radiative decay of the Λ*(1520)

被引:30
作者
Doring, M. [1 ]
Oset, E.
Sarkar, Sourav
机构
[1] Univ Valencia, Ctr Mixto, Dept Fis Teor, CSIC,Inst Invest Paterna, Valencia 46071, Spain
[2] Univ Valencia, Ctr Mixto, CSIC, IFIC,Inst Invest Paterna, Valencia 46071, Spain
[3] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India
来源
PHYSICAL REVIEW C | 2006年 / 74卷 / 06期
关键词
D O I
10.1103/PhysRevC.74.065204
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
A recently developed nonperturbative chiral approach to dynamically generate the 3/2(-) baryon resonances has been extended to investigate the radiative decays Lambda(*)(1520)->gamma Lambda(1116) and Lambda(*)(1520)->gamma Sigma(0)(1193). We show that the Lambda(*)(1520) decay into gamma Lambda is an ideal test for the need of extra components of the resonance beyond those provided by the chiral approach since the largest meson-baryon components give no contribution to this decay. The case is different for gamma Sigma decay, where the theory agrees with experiment, though the large uncertainties of these data call for more precise measurements. Some estimates of the weight of the needed genuine resonance component are made.
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页数:12
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共 53 条
[1]   Measurement of the radiative decay width T [Δ (1520)→Δγ] with the SPHINX spectrometer [J].
Antipov, YM ;
Artamonov, AV ;
Batarin, V ;
Vavilov, DV ;
Victorov, V ;
Eroshin, OV ;
Golovkin, SV ;
Gorin, YP ;
Kolganov, VZ ;
Kozhevnikov, AP ;
Konstantinov, AS ;
Kubarovsky, VP ;
Kurshetsov, VF ;
Landsberg, LG ;
Leontiev, VM ;
Lomkatsi, GS ;
Molchanov, VV ;
Mukhin, VA ;
Nilov, AF ;
Patalakha, DI ;
Petrenko, SV ;
Smolyankin, V .
PHYSICS LETTERS B, 2004, 604 (1-2) :22-30
[2]   STRANGE PARTICLE-NUCLEUS INTERACTIONS [J].
BERTINI, R .
NUCLEAR PHYSICS B, 1987, 279 (1-2) :49-64
[3]  
Bertini R., SACLAYDPHN2372
[4]   Algebraic models of hadron structure II. Strange baryons [J].
Bijker, R ;
Iachello, F ;
Leviatan, A .
ANNALS OF PHYSICS, 2000, 284 (01) :89-133
[5]   Gauge invariance in two-particle scattering [J].
Borasoy, B ;
Bruns, PC ;
Meissner, UG ;
Nissler, R .
PHYSICAL REVIEW C, 2005, 72 (06)
[6]   STRONG AND ELECTROMAGNETIC DECAYS OF THE BARYON DECUPLET [J].
BUTLER, MN ;
SAVAGE, MJ ;
SPRINGER, RP .
NUCLEAR PHYSICS B, 1993, 399 (01) :69-85
[7]   LOW SCATTERING EQUATION FOR THE CHARGED AND NEUTRAL SCALAR THEORIES [J].
CASTILLEJO, L ;
DALITZ, RH ;
DYSON, FJ .
PHYSICAL REVIEW, 1956, 101 (01) :453-458
[8]  
CHEN TD, 2003, PHYS REV D, V68, P6003
[9]   EFFECTIVE-RANGE APPROACH TO THE LOW-ENERGY RHO-WAVE PION-NUCLEON INTERACTION [J].
CHEW, GF ;
LOW, FE .
PHYSICAL REVIEW, 1956, 101 (05) :1570-1579
[10]   New relations for excited baryons in large-Nc QCD -: art. no. 012001 [J].
Cohen, TD ;
Lebed, RF .
PHYSICAL REVIEW LETTERS, 2003, 91 (01)