Two-meson cloud contribution to the baryon antidecuplet self-energy
نویسندگان
چکیده
T. Hyodo, A. Hosaka, F.J. Llanes-Estrada, E. Oset, J. R. Peláez and M. J. Vicente Vacas, Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047, Japan. Universidad Complutense de Madrid, Depto. F́ısica Teórica I, 28040 Madrid, Spain. Departamento de F́isica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptd. 22085, 46071 Valencia, Spain.
منابع مشابه
Two-meson cloud contribution to the baryon antidecuplet binding
A. Hosaka, T. Hyodo1∗, F.J. Llanes-Estrada2†, E. Oset, J. R. Peláez, and M. J. Vicente Vacas Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047, Japan. Universidad Complutense de Madrid, Depto. F́ısica Teórica I, 28040 Madrid, Spain. Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptd. 22085, 46071 Vale...
متن کاملHadronic Aspects of Exotic Baryons
In this talk I look into three different topics, addressing first the possibility that the Θ is a bound state of KπN , exploiting the results of this study to find out the contribution of two meson and one baryon components in the baryon antidecuplet and in the third place I present results on a new resonant exotic baryonic state which appears as dynamically generated by the Weinberg Tomozawa ∆...
متن کاملOn photoexcitation of baryon antidecuplet
We show that the photoexcitation of the baryon antidecuplet, suggested by the soliton classification of low-lying baryons, is strongly suppressed on the proton target. The process occurs mostly on the neutron target. This qualitative prediction can be useful in identifying the non-exotic members of the antidecuplet in the known baryon spectrum. We also analyze the interrelation between photocou...
متن کاملBaryon masses in a chiral expansion with meson-baryon form factors
The chiral expansion of the one-loop corrections to baryon masses is examined in a generic meson-cloud model with meson-baryon form factors. For pion loops, the expansion is rapidly convergent and at fourth order inmπ accurately reproduces the full integral. In contrast, the expansion is found to converge very slowly for kaon loops, raising questions about the usefulness of chiral expansions fo...
متن کاملar X iv : h ep - p h / 06 11 23 8 v 3 2 6 Fe b 20 07 K ∗ - couplings for the antidecuplet excitation
We estimate the coupling of the K∗ vector meson to the N → Θ transition employing unitary symmetry, vector meson dominance, and results from the GRAAL Collaboration for η photoproduction off the neutron. Our small numerical value for the coupling constant is consistent with the nonobservation of the Θ in recent CLAS searches for its photoproduction. We also estimate the K∗coupling for the N → Σ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005