Search for the (Θ)over-bar- → K-(n)over-bar with PHENIX

被引：56

作者：

Pinkenburg, C ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2004年 / 30卷 / 08期

关键词：

D O I：

10.1088/0954-3899/30/8/090

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：

The PHENIX experiment at RHIC should be sensitive to decays of the antipentaquark (Θ) over bar via the K-(n) over bar channel. Charged kaons can be identified using the standard tracking and time of flight up to a momentum of 1.5 GeV/c. Anti-neutron candidates are detected via their annihilation signal in the highly segmented electromagnetic calorimeter (EMCal). In order to assess the quality of the anti-neutron identification, we reconstruct the (Σ) over bar --> (n) over bar pi. As an additional cross-check, the invariant mass of K+(n) over bar is reconstructed where no resonance in the pentaquark mass range is expected. At present, no enhancement at the expected pentaquark mass is observed in dAu collisions at rootS(SS) = 200 GeV.

引用

页码：S1201 / S1205

页数：5

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