Determination of the possible quantum numbers for the newly observed Ξ<i><sub>b</sub></i>(6227)<SUP>0</SUP> state

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2021

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Springer

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Physics Group
Atılım University Physics Division was established with the purpose of educating the first-year students of the Engineering and other Departments by providing the general physics courses and, in addition, to make scientific and technological researches at the universal level. Now adays, Physics Division provide the students of Engineering, School of Aviation and Mathematics Departments with the general physics lectures having international education quality. We have in the Group the facilities of the mechanics and electricity laboratories, where the students have the opportunity to realize the practice of the theoretical knowledge in physics. Beside the compulsory courses (General Physics I and General Physics II) there are also elective courses offered by the Group. The faculty members in the Group, whose research interests and fields are given in web-page of the Group in details, perform theoretical as well as experimental researches and make publications in SSC-index journals. Graduate program, with master of sciences and doctorate degree courses and theses, is offered in different scientific areas (for details, see the web-page of the Division). In the Physcis Division there are 6 faculty members, five research assistants, and one technician.

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Abstract

The LHCb Collaboration recently reported the observation of a new excited bottom baryon Xi(b)(6227)(0) and announced an improvement in the measurements related to the previously observed Xi(b)(6227)(-) state. We conduct an analysis for Xi(b)(6227)(0) state considering it as isospin partner of the Xi(b)(6227)(-) resonance and possibly 1P or 2S excited state with spin J = 3/2. The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to Xi(-)(b)pi(+) final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Xi(b)(6227)(0) to be the 1P excited state of Xi(b)(5945)(0) baryon.

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Azizi, Kazem/0000-0003-3741-2167

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Phenomenological Models

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12

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3

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https://doi.org/10.1007/JHEP03(2021)244
 https://hdl.handle.net/20.500.14411/2069

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