Published March 2005 | Version v1
Journal article Metadata-only

Search for Θ+(1540) in exclusive proton-induced reaction p+C(N)→Θ+K0-bar+C(N) at the energy of 70 GeV

Creators

  • 1. Inst. of High Energy Physics, Protvino (Russian Federation) and others
  • 2. Inst. of Theoretical and Experimentsl Physics, Moscow (Russian Federation)

Description

A search for narrow Θ+(1540), a candidate for pentaquark baryon with positive strangeness, has been performed in an exclusive proton-induced reaction p+C(N)→Θ+K0-bar+C(N) on carbon nuclei or quasifree nucleons at Ebeam=70 GeV studying nK+, pKS0, and pKL0 decay channels of Θ+(1540) in four different final state of the Θ+Kp-bar system. Upper limits on the cross-section ratio σ(Θ+K0-bar)/σ(Λ(1520)K+)<0.02 and σ(Θ+K0-bar)/σ(pφ)<0.15 at 90 % C.L. and a preliminary upper limit for the forward-hemisphere cross section σ(Θ+K0-bar)<30 nb/nucleon were obtained

Abstract (Russian)

В эксклюзивной реакции p+C(N)→Θ+K0-bar+C(N) на ядрах углерода или квазисвободных нуклонах в протонном пучке с энергией 70 ГэВ были проведены поиски узкого Θ+(1540), кандидата в пентакварковые барионы с положительной странностью. Поиски велись в трех возможных распадных каналах Θ+(1540)→nK+, pKS0 и pKL0 и четырех различных конечных состояниях Θ+Kp-bar-системы. Были получены ограничения на отношения сечений σ(Θ+K0-bar)/σ(Λ(1520)K+)<0.02 и σ(Θ+K0-bar)/σ(pφ)<0.15 на уровне достоверности 90 % и предварительное ограничение на сечение образования Θ+K0-bar-системы в переднюю полусферу σ(Θ+K0-bar)<30 нбн/нуклон

Additional details

Publishing Information

Journal Title
Yadernaya Fizika
Journal Volume
68
Journal Issue
3
Journal Page Range
p. 468-483
ISSN
0044-0027
CODEN
IDFZA7

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36055154
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
CARBON; CROSS SECTIONS; EXCLUSIVE INTERACTIONS; GEV RANGE 10-100; KAONS NEUTRAL SHORT-LIVED; KAONS PLUS; LAMBDA-1520 BARYONS; MESONS; NUCLEONS; PARTICLE DECAY; PROTON BEAMS; PROTON REACTIONS
Descriptors DEC
BARYON REACTIONS; BARYONS; BEAMS; BOSONS; CHARGED-PARTICLE REACTIONS; DECAY; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON REACTIONS; HADRONS; HYPERONS; INTERACTIONS; KAONS; KAONS NEUTRAL; LAMBDA BARYONS; MESONS; NONMETALS; NUCLEAR REACTIONS; NUCLEON BEAMS; NUCLEON REACTIONS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES

Optional Information

Notes
40 refs.; 3 tabs.; 14 figs.