标题： 在HERA的电子质子碰撞中搜索衰变为D^*+/- p^-/+ 的窄的魅夸克重子态 显示英文标题

标题： Search for a narrow charmed baryonic state decaying to D^*+/- p^-/+ in ep collisions at HERA

摘要： 在使用HERA的ZEUS探测器，利用126 pb^-1的积分亮度的情况下，对D^*+/- p^-/+不变质量谱进行了共振搜索。 衰变通道D^*+ -> D^0 pi^+_s -> (K^- pi^+) pi^+_s 和 D^*+ -> D^0 pi^+_s -> (K^- pi^+ pi^+ pi^-) pi^+_s（以及相应的反粒子衰变）被用来识别D^*+/-介子。 从超过60000个重建的D^*+/-介子中未在D^*+/- p^-/+质量谱中观察到共振结构。 结果与H1合作组关于奇异五夸克Theta^0_c的报告不一致。 显示英文摘要

摘要： A resonance search has been made in the D^*+/- p^-/+ invariant-mass spectrum with the ZEUS detector at HERA using an integrated luminosity of 126 pb^-1. The decay channels D^*+ -> D^0 pi^+_s -> (K^- pi^+) pi^+_s and D^*+ -> D^0 pi^+_s -> (K^- pi^+ pi^+ pi^-) pi^+_s (and the corresponding antiparticle decays) were used to identify D^*+/- mesons. No resonance structure was observed in the D^*+/- p^-/+ mass spectrum from more than 60000 reconstructed D^*+/- mesons. The results are not compatible with a report of the H1 Collaboration of a charmed pentaquark, Theta^0_c.