Resonant formation of {Lambda}(1405) by stopped-K{sup -} absorption in the deuteron

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.055207· OSTI ID:21502512

Esmaili, Jafar ^[1]; Akaishi, Yoshinori ^[1]; Yamazaki, Toshimitsu ^[1]

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1. RIKEN, Nishina Center, Wako, Saitama 351-0198 (Japan)

To solve the current debate on the position of the quasibound K{sup -}p state, namely, ''{Lambda}(1405) or {Lambda}*(1420),'' we propose to measure the T{sub 21}=T{sub {Sigma}{pi}<-K}-bar{sub N} {Sigma}{pi} invariant-mass spectrum in stopped-K{sup -} absorption in the deuteron, since the spectrum, reflecting the soft and hard deuteron momentum distribution, is expected to have a narrow quasifree component with an upper edge of M=1430 MeV/c{sup 2}, followed by a significant 'high-momentum' tail toward the lower mass region, where a resonant formation of {Lambda}(1405) of any mass and width in a wide range will be clearly revealed. We introduce a 'deviation' spectrum as defined by DEV = OBS (observed or calculated) / QF (nonresonant quasifree), in which the resonant component can be seen as an isolated peak free from the QF shape.

• OSTI ID: 21502512
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevC.83.055207; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABSORPTION
DEUTERONS
DISTRIBUTION
KAONS MINUS
LAMBDA-1405 BARYONS
MASS
MASS SPECTRA
MEV RANGE
BARYONS
BOSONS
CHARGED PARTICLES
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
HYPERONS
KAONS
LAMBDA BARYONS
MESONS
PSEUDOSCALAR MESONS
SORPTION
SPECTRA
STRANGE MESONS
STRANGE PARTICLES