Spectroscopy and decays of the fully-heavy tetraquarks
Autor: | Muhammad Naeem Anwar, Jacopo Ferretti, Feng-Kun Guo, Elena Santopinto, Bing-Song Zou |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: | |
Zdroj: | European Physical Journal C: Particles and Fields, Vol 78, Iss 8, Pp 1-9 (2018) |
Druh dokumentu: | article |
ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-018-6073-9 |
Popis: | Abstract We discuss the possible existence of the fully-heavy tetraquarks. We calculate the ground-state energy of the $$bb {\bar{b}} {\bar{b}}$$ bbb¯b¯ bound state, where b stands for the bottom quark, in a nonrelativistic effective field theory framework with one-gluon-exchange (OGE) color Coulomb interaction, and in a relativized diquark model characterized by OGE plus a confining potential. Our analysis advocates the existence of uni-flavor heavy four-quark bound states. The ground state $$bb{\bar{b}}{\bar{b}}$$ bbb¯b¯ tetraquark mass is predicted to be $$(18.72\pm 0.02)$$ (18.72±0.02) GeV. Mass inequality relations among the lowest $$QQ\bar{Q}\bar{Q}$$ QQQ¯Q¯ states, where $$Q\in \{c, b\}$$ Q∈{c,b} , and the corresponding heavy quarkonia are presented, which give the upper limit on the mass of ground state $$QQ\bar{Q}\bar{Q}$$ QQQ¯Q¯ . The possible decays of the lowest $$bb\bar{b}\bar{b}$$ bbb¯b¯ are highlighted, which might provide useful references in the search for them in ongoing LHC experiments, and its width is estimated to be a few tens of MeV. |
Databáze: | Directory of Open Access Journals |
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