Nuclear Theory·nucl-th

Monday·August 16, 2021

5 papers—2 primary·3 cross-listed

03
Forming Molecular States with Hadronic Rescattering
Philip Ilten🇺🇸 · Marius Utheim🇸🇪
A method for modelling the prompt production of molecular states using the hadronic rescattering framework of the general-purpose Pythia event generator is introduced. Production cross sections of possible exotic hadronic molecules via hadronic rescattering at the LHC are calculated for the $χ_{c 1} (3872)$ resonance, a possible tetraquark state, as well as three possible pentaquark states, $P_{c}^{+} (4312)$ , $P_{c}^{+} (4440)$ , and $P_{c}^{+} (4457)$ . For the $P_{c}^{+}$ states, the expected cross section from $Λ_{b}$ decays is compared to the hadronic-rescattering production. The $χ_{c 1} (3872)$ cross section is compared to the fiducial $χ_{c 1} (3872)$ cross-section measurement by LHCb and found to contribute at a level of O(1%). Finally, the expected yields of $P_{c}^{+}$ production from hadronic rescattering during Run 3 of LHCb are estimated. The prompt background is found to be significantly larger than the prompt $P_{c}^{+}$ signal from hadronic rescattering.
↳ hep-phnucl-thEPJA(2022)·29 citations
04
Pole analysis on the doubly charmed meson in $D^{0} D^{0} π^{+}$ mass spectrum
Ling-Yun Dai🇨🇳 · Xiang Sun🇨🇳 · Xian-Wei Kang🇨🇳 · A. P. Szczepaniak🇺🇸 · Jie-Sheng Yu🇨🇳
In this paper we study the scattering amplitudes of $D^{0} D^{0} π^{+}$ - $D^{*+} D^{0}$ coupled channels based on $K$ -matrix within the Chew-Mandelstam formalism. The $D^{0} D^{0} π^{+}$ invariant mass spectrum of LHCb is fitted and the pole parameters of the $T_{cc}^{+}$ are extracted. The analysis of pole behavior suggests that the $T_{cc}^{+}$ may originate from a $D^{*+} D^{0}$ virtual state and is formed as a result of an interplay between an attractive interaction between $D^{0}$ and $D^{*+}$ and coupling to $D^{0} D^{0} π^{+}$ channel.
↳ hep-phnucl-thPRD(2022)·36 citations
05
Mass spectra and decays of open-heavy tetraquark states
Tao Guo🇨🇳 · Jianing Li🇨🇳 · Jiaxing Zhao🇨🇳 · Lianyi He🇨🇳
Open-heavy tetraquark states, especially those contain four different quarks have drawn much attention in both theoretical and experimental fields. In the framework of the improved chromomagnetic interaction (ICMI) model, we complete a systematic study on the mass spectra and possible strong decay channels of the $S$ -wave open-heavy tetraquark states, $q q q ˉ Q ˉ$ ( $q = u, d, s$ and $Q = c, b$ ), with different quantum number $J^{P} = 0^{+}$ , $1^{+}$ , and $2^{+}$ . The parameters in the ICMI model are extracted from the conventional hadron spectra and used directly to predict the mass of tetraquark states. Several compact bound states and narrow resonances are found in both charm-strange and bottom-strange tetraquark sectors, most of them as a product of the strong coupling between the different channels. Our results show the recently discovered four different flavors tetraquark candidates $X_{0} (2900)$ is probably compact $u d s ˉ c ˉ$ state with quantum number $J^{P} = 0^{+}$ . The predictions about $X_{0} (2900)$ and its partners are expected to be better checked with other theories and future experiments.
↳ hep-phnucl-thPRD(2022)·33 citations

Affiliations

first authorsco-authorsvia INSPIRE

Forming Molecular States with Hadronic Rescattering

Pole analysis on the doubly charmed meson in D0D0π+ mass spectrum

Mass spectra and decays of open-heavy tetraquark states

Affiliations

Pole analysis on the doubly charmed meson in $D^{0} D^{0} π^{+}$ mass spectrum