Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Burns, T. J."'
Autor:
Burns, T. J., Swanson, E. S.
We present a model for the $J/\psi\Lambda$ spectrum in $B^-\to J/\psi \Lambda \bar{p}$ decays, including the $P_{\psi s}^\Lambda(4338)$ baryon recently observed by the LHCb collaboration. We assume production via triangle diagrams which couple to the
Externí odkaz:
http://arxiv.org/abs/2208.05106
Autor:
Burns, T. J., Swanson, E. S.
We develop a model for the production of the Pc states observed at LHCb in Lambdab - Jpsi p K- decays. With fewer parameters than other approaches, we obtain excellent fits to the Jpsi-p invariant mass spectrum, capturing both the prominent peaks, an
Externí odkaz:
http://arxiv.org/abs/2207.00511
Autor:
Burns, T. J., Swanson, E. S.
Publikováno v:
Eur. Phys. J. A (2022) 58:68
Using new experimental data on photoproduction and $\Lambda_b^0$ decays, we derive constraints on the properties of the LHCb $P_c$ states. We conclude that $P_c(4312)$, $P_c(4380)$ and $P_c(4440)$ can be described as $\Sigma_c\bar D$, $\Sigma_c^*\bar
Externí odkaz:
http://arxiv.org/abs/2112.11527
Autor:
Burns, T. J., Swanson, E. S.
Publikováno v:
Phys. Rev. D 103, 014004 (2021)
We make predictions for the production and decays of $X(2900)$ states, and their possible charged partners, in $B^+$ and $B^0$ decays, considering a number of competing models for the states, including triangle diagrams mediated by quark exchange or
Externí odkaz:
http://arxiv.org/abs/2009.05352
Autor:
Burns, T. J., Swanson, E. S.
We examine whether the LHCb vector $ud\bar{c}\bar{s}$ state $X(2900)$ can be interpreted as a kinematical cusp effect arising from $\bar D^*K^*$ and $\bar D_1 K^*$ interactions. The production amplitude is modelled as a triangle diagram with hadronic
Externí odkaz:
http://arxiv.org/abs/2008.12838
Autor:
Burns, T. J., Swanson, E. S.
Publikováno v:
Phys. Rev. D 100, 114033 (2019)
A molecular model of the $P_c(4457)$ and $P_c(4440)$ LHCb states is proposed. The model relies on channels coupled by long range pion-exchange dynamics with features that depend crucially on the novel addition of the $\Lambda_c(2595)\bar D$ channel.
Externí odkaz:
http://arxiv.org/abs/1908.03528
Autor:
Burns, T. J., Swanson, E. S.
A variety of options for interpreting the D\O{} state, $X(5568)$, are examined. We find that threshold, cusp, molecular, and tetraquark models are all unfavoured. Several experimental tests for unravelling the nature of the signal are suggested.
Externí odkaz:
http://arxiv.org/abs/1603.04366
Autor:
Burns, T. J.
Publikováno v:
Eur.Phys.J. A51 (2015) 11, 152
The $P_c(4380)^+$ and $P_c(4450)^+$ states recently discovered at LHCb have masses close to several relevant thresholds, which suggests they can be described in terms of meson-baryon degrees of freedom. This article explores the phenomenology of thes
Externí odkaz:
http://arxiv.org/abs/1509.02460
Autor:
Burns, T. J.
General results are obtained for meson mass splittings and mixings in unquenched (coupled-channel) quark models. Theorems derived previously in perturbation theory are generalised to the full coupled-channel system. A new formula is obtained for the
Externí odkaz:
http://arxiv.org/abs/1411.2485