ON TETRAQUARK MESON STATES
نویسندگان
چکیده
منابع مشابه
On tetraquark meson states
It is suggested that the narrow meson state seen in the the SELEX experiment is a (cs̄ss̄) tetraquark state. Characteristics of other possible tetraquarks formed out of c and s quarks and antiquarks are considered. SELEX experiment has reported [1] a puzzling narrow meson state at a mass of 2632.6± 1.6 MeV/c which decays preferentially to D s (cs̄) + η(548) rather than to D(cd̄)+K or D(cū)+K. In th...
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Frank E. Close Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Keble Road, Oxford, OX1 3NP, United Kingdom (Received 27 February 2008; published 8 May 2008) We propose a search for the newly discovered tetraquark candidate Zð4430Þ in photoproduction. Based on the Belle results, we show that if Zð4430Þ is a genuine resonance, its significantly large coupling to 0 will cause ...
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We present an exact calculation of S and P wave QQn̄n̄ states using different standard nonrelativistic quark–quark potentials. We explore in detail the charm and bottom sectors looking for bound states that could be measured within existing facilities. Against the proliferation of four–quark states sometimes predicted in the literature, we found a small number of candidates to be stable. We analy...
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The scalar-meson assignments of Shakin andWang in a generalized Nambu–Jona-Lasinio model are contradicted by recent experimental information. Also the strict distinction made by these authors between “intrinsic” and “dynamically generated” states is contested, as well as a number of other statements. In Ref. [1], Shakin and Wang (SW) revisit a generalized Nambu–Jona-Lasinio (NJL) model, recentl...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2005
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x05025437