Search for the doubly heavy baryons And Decaying to And

Xuan Luo (Department of Physics, Guizhou Minzu University, China) ; Hai-Bing Fu (Department of Physics, Guizhou Minzu University, China) ; Hai-Jiang Tian (Department of Physics, Guizhou Minzu University, China)

The first search for the doubly heavy $ {{{{\varOmega}_{bc}^{0}}}} $ baryon and a search for the $ {{{{\varOmega}_{bc}^{0}}}} $ baryon are performed using $ {{{{\varOmega}_{bc}^{0}}}} $ collision data collected via the $ {{{{\varOmega}_{bc}^{0}}}} $ experiment from 2016 to 2018 at a centre-of-mass energy of $ {{{{\varOmega}_{bc}^{0}}}} $ , corresponding to an integrated luminosity of 5.2 $ {{{{\varOmega}_{bc}^{0}}}} $ . The baryons are reconstructed via their decays to $ {{{{\varOmega}_{bc}^{0}}}} $ and $ {{{{\varOmega}_{bc}^{0}}}} $ . No significant excess is found for invariant masses between 6700 and 7300 $ {{{{\varOmega}_{bc}^{0}}}} $ , in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 $ {{{{\varOmega}_{bc}^{0}}}} $ . Upper limits are set on the ratio of the $ {{{{\varOmega}_{bc}^{0}}}} $ and $ {{{{\varOmega}_{bc}^{0}}}} $ production cross-section times the branching fraction to $ {{{{\varOmega}_{bc}^{0}}}} $ ( $ {{{{\varOmega}_{bc}^{0}}}} $ ) relative to that of the $ {{{{\varOmega}_{bc}^{0}}}} $ ( $ {{{{\varOmega}_{bc}^{0}}}} $ ) baryon, for different lifetime hypotheses, at 95% confidence level. The upper limits range from $ {{{{\varOmega}_{bc}^{0}}}} $ to $ {{{{\varOmega}_{bc}^{0}}}} $ for the $ {{{{\varOmega}_{bc}^{0}}}} $ ( $ {{{{\varOmega}_{bc}^{0}}}} $ ) decay, and from $ {{{{\varOmega}_{bc}^{0}}}} $ to $ {{{{\varOmega}_{bc}^{0}}}} $ for the $ {{{{\varOmega}_{bc}^{0}}}} $ ( $ {{{{\varOmega}_{bc}^{0}}}} $ ) decay, depending on the considered mass and lifetime of the $ {{{{\varOmega}_{bc}^{0}}}} $ ( $ {{{{\varOmega}_{bc}^{0}}}} $ ) baryon.

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      "value": "The first search for the doubly heavy   $ {{{{\\varOmega}_{bc}^{0}}}} $   baryon and a search for the   $ {{{{\\varOmega}_{bc}^{0}}}} $   baryon are performed using   $ {{{{\\varOmega}_{bc}^{0}}}} $   collision data collected via the   $ {{{{\\varOmega}_{bc}^{0}}}} $   experiment from 2016 to 2018 at a centre-of-mass energy of   $ {{{{\\varOmega}_{bc}^{0}}}} $  , corresponding to an integrated luminosity of 5.2   $ {{{{\\varOmega}_{bc}^{0}}}} $  . The baryons are reconstructed via their decays to   $ {{{{\\varOmega}_{bc}^{0}}}} $   and   $ {{{{\\varOmega}_{bc}^{0}}}} $  . No significant excess is found for invariant masses between 6700 and 7300   $ {{{{\\varOmega}_{bc}^{0}}}} $  , in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20   $ {{{{\\varOmega}_{bc}^{0}}}} $  . Upper limits are set on the ratio of the   $ {{{{\\varOmega}_{bc}^{0}}}} $   and   $ {{{{\\varOmega}_{bc}^{0}}}} $   production cross-section times the branching fraction to   $ {{{{\\varOmega}_{bc}^{0}}}} $   (   $ {{{{\\varOmega}_{bc}^{0}}}} $  ) relative to that of the   $ {{{{\\varOmega}_{bc}^{0}}}} $   (   $ {{{{\\varOmega}_{bc}^{0}}}} $  ) baryon, for different lifetime hypotheses, at 95% confidence level. The upper limits range from   $ {{{{\\varOmega}_{bc}^{0}}}} $   to   $ {{{{\\varOmega}_{bc}^{0}}}} $   for the   $ {{{{\\varOmega}_{bc}^{0}}}} $   (   $ {{{{\\varOmega}_{bc}^{0}}}} $  ) decay, and from   $ {{{{\\varOmega}_{bc}^{0}}}} $   to   $ {{{{\\varOmega}_{bc}^{0}}}} $   for the   $ {{{{\\varOmega}_{bc}^{0}}}} $   (   $ {{{{\\varOmega}_{bc}^{0}}}} $  ) decay, depending on the considered mass and lifetime of the   $ {{{{\\varOmega}_{bc}^{0}}}} $   (   $ {{{{\\varOmega}_{bc}^{0}}}} $  ) baryon."
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Published on:
01 September 2021
Publisher:
IOP
Published in:
Chinese Physics C , Volume 45 (2021)
Issue 9
Article ID: 093002
DOI:
https://doi.org/10.1088/1674-1137/ac0c70
arXiv:
2104.04759
Copyrights:
© 2021Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd
Licence:
CC-BY-3.0

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