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T: Teilchenphysik

T 304: Seltene Zerf
älle

T 304.5: Talk

Friday, March 4, 2005, 17:30–17:45, TU H1029

Cross section measurements of a narrow baryonic state decaying to K_sp and K_sp in deep inelastic scattering at HERA — •Amita Raval — ZEUS/DESY; Notkestrasse 85; 22607 Hamburg

Recent results from the ZEUS experiment have provided evidence for a narrow baryon resonance decaying to K_sp(p), interpreted as a pentaquark (anti-pentaquark). The measurement was performed in the central rapidity region of inclusive deep inelastic scattering at an ep centre-of-mass energy of 300-318 GeV for exchanged photon virtuality, Q², above 20 GeV². This study extends the previous analysis by presenting cross-section measurements for Θ⁺ production and decay. The cross sections were compared in bins of Q_min² to those of Λ baryons produced in the same kinematic region.