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pro vyhledávání: '"Peng, Fang-Zheng"'
The spectrum of the $c qq$ baryons contains a few states whose nature is not clearly a three-quark composite and which might have a sizable baryon-meson component. Examples include the $\Sigma_c(2800)$ or the $\Lambda_c(2940)$. Here we explore the sp
Externí odkaz:
http://arxiv.org/abs/2304.14855
The spectrum of the charmed meson-(anti)meson system is a fundamental tool for disentangling the nature of a few exotic hadrons, including the recently discovered $T_{cc}^+(3875)$ tetraquark, the $X(3960)$, or the $X(3872)$, the nature of which is st
Externí odkaz:
http://arxiv.org/abs/2304.13515
The nature of the $P_{c}(4312)$, $P_c(4440)$ and $P_c(4457)$ pentaquarks is a fascinating theoretical question. Within the molecular picture their more usual interpretation is that of $I=\tfrac{1}{2}$ $\bar{D} \Sigma_c$ and $\bar{D}^* \Sigma_c$ bound
Externí odkaz:
http://arxiv.org/abs/2211.09154
Autor:
Yang, Zi-Ying, Peng, Fang-Zheng, Yan, Mao-Jun, Sánchez, Mario Sánchez, Valderrama, Manuel Pavon
Theoretical predictions for the spectrum of heavy meson-baryon bound states are a fundamental tool for disentangling the nature of the different pentaquark states that have been observed in experimental facilities. Here we explore this spectrum in a
Externí odkaz:
http://arxiv.org/abs/2211.08211
The LHCb collaboration has detected a new hidden-charm pentaquark with the quantum numbers of a $\Lambda$ baryon: the $P_{\psi s}^{\Lambda}(4338)$. In the molecular picture this pentaquark will be interpreted as a $\bar{D} \Xi_c$ molecule. Here we br
Externí odkaz:
http://arxiv.org/abs/2207.11144
Publikováno v:
Phys. Rev. D 107, 016001 (2023)
The heavy hadron spectrum is constrained by symmetries, of which two of the most important ones are heavy-quark spin and SU(3)-flavor symmetries. Here we argue that in the molecular picture the $Y(4230)$ (or $Y(4260)$), the $Y(4360)$ and the recently
Externí odkaz:
http://arxiv.org/abs/2205.13590
Publikováno v:
EPJC 82, 574 (2022)
Recently the LHCb collaboration has observed a new pentaquark state, the $P_c(4337)^+$. Owing to its proximity to the $\chi_{c0}(1S) p$, $\bar{D}^* \Lambda_c$, $\bar{D} \Sigma_c$ and $\bar{D} \Sigma_c^*$ thresholds, this new pentaquark might very wel
Externí odkaz:
http://arxiv.org/abs/2108.05306
Publikováno v:
Phys. Rev. D 104, 114025 (2021)
Early speculations about the existence of heavy hadron molecules were grounded on the idea that light-meson exchanges forces could lead to binding. In analogy to the deuteron, the light-mesons usually considered include the pion, sigma, rho and omega
Externí odkaz:
http://arxiv.org/abs/2102.13058
Publikováno v:
Phys. Rev. D 105, 034028 (2022)
If known, the spectrum of heavy-hadron molecules will be a key tool to disentangle the nature of the exotic states that are being discovered in experiments. Here we argue that the general features of the molecular spectrum can be deduced from the ide
Externí odkaz:
http://arxiv.org/abs/2101.07213
Publikováno v:
Eur. Phys. J. C 81, 666 (2021)
The observation of the $P_{cs}(4459)$ by the LHCb collaboration adds a new member to the set of known hidden-charm pentaquarks, which includes the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$. The $P_{cs}(4459)$ is expected to have the light-quark conten
Externí odkaz:
http://arxiv.org/abs/2011.01915