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The anticharmed exotic baryon Theta_c and its relatives | | Marek Karliner
; Harry J. Lipkin
; | | Date: |
28 Jul 2003 | | Subject: | hep-ph | | Affiliation: | Tel Aviv U.) and Harry J. Lipkin (Weizmann Inst., Tel Aviv U. and Argonne | | Abstract: | Motivated by the recent discovery of the exotic S=+1 narrow baryon resonance Theta^+ at 1540 MeV, with quark content {uudd sbar}, we conjecture the existence of its anti-charmed analogue Theta_c, with quark content {uudd cbar}, and compute its likely properties. We rely on the recently constructed model of a novel kind of a pentaquark with an unusual color structure which provides a good approximation to the Theta^+ mass. We expect that Theta_c is an isosinglet with J^P=1/2^+ and estimate its mass at 2985 pm 50 MeV. We also discuss another possible exotic baryon resonance containing heavy quarks, the Theta_b^+, a {uudd bbar} state, and estimate m_{Theta_b^+}=6398 pm 50 MeV. These states should appear as unexpectedly narrow peaks in D^-p, Dbar^0 n, B^0 p and B^+ n mass distributions. | | Source: | arXiv, hep-ph/0307343 | | Services: | Forum | Review | PDF | Favorites | |
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