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Cross sections for the charm-production reactions $\bar p p \to \bar \Lambda_c^- \Sigma_c^+$, $\bar \Sigma_c\Sigma_c$, $\bar \Xi_c\Xi_c$, and $\bar \Xi_c'\Xi_c'$ are presented, for energies near their respective thresholds. The results are…

Nuclear Theory · Physics 2017-01-25 J. Haidenbauer , G. Krein

Kaon production in pion-nucleon collisions in nuclear matter is studied in the resonance model. To evaluate the in-medium modification of the reaction amplitude as a function of the baryonic density we introduce relativistic, mean-field…

Nuclear Theory · Physics 2010-02-17 K. Tsushima , A. Sibirtsev , A. W. Thomas

The momentum correlation functions of S = -2 baryon pairs (p Xi^- and Lambda Lambda) produced in high-energy pp and pA collisions are investigated on the basis of the coupled-channel formalism. The strong interaction is described by the…

High Energy Physics - Phenomenology · Physics 2022-02-09 Y. Kamiya , K. Sasaki , T. Fukui , T. Hyodo , K. Morita , K. Ogata , A. Ohnishi , T. Hatsuda

In this study, we comprehensively investigate the production of isovector scalar meson $a_{0}(1817)$ using the effective Lagrangian approach. Specifically, we employ the Reggeized $t$ channel Born term to calculate the total and…

High Energy Physics - Phenomenology · Physics 2023-08-17 Xiao-Yun Wang , Hui-Fang Zhou , Xiang Liu

We study the weak decay of the $\Lambda_b$ into $ J/\psi ~ K ~ \Xi$ and $J/\psi ~ \eta ~ \Lambda$ states, and relate these processes to the $\Lambda_b \to J/\psi ~ \bar K ~N$ decay mode. The elementary weak transition at the quark level…

High Energy Physics - Phenomenology · Physics 2015-11-04 A. Feijoo , V. K. Magas , A. Ramos , E. Oset

We report recent results on the dynamics of strange hadrons in two-body reactions relevant for near-threshold production in heavy-ion collisions at GSI/FAIR and NICA-Dubna. In particular, $\bar K N$ scattering in hot and dense nuclear…

High Energy Physics - Phenomenology · Physics 2016-02-17 Daniel Cabrera , Laura Tolos , Jörg Aichelin , Elena bratkovskaya

We employ an effective Lagrangian approach to investigate double $\phi$ production in the $\bar{p}p$ reaction near the threshold and describe a notable violation of the Okubo-Zweig-Iizuka (OZI) rule in this reaction process through hadronic…

High Energy Physics - Phenomenology · Physics 2025-05-02 Dayoung Lee , Jung Keun Ann , Seung-il Nam

We investigate the production of charm-baryon hypernucleus $^{16}_{\Lambda_c^+}$O in the antiproton - $^{16}$O collisions within a fully covariant model that is based on an effective Lagrangian approach. The explicit ${\bar \Lambda}_c^ -…

Nuclear Theory · Physics 2017-06-16 R. Shyam , K. Tsushima

We investigate the hidden strange $\phi$ meson production in heavy-ion collisions from subthreshold ($E_{kin}\approx 1$ A GeV) to relativistic ($E_{kin}\approx 21$ A TeV) energies as well as its coupling to the open strange mesons (kaons,…

Nuclear Theory · Physics 2022-08-31 Taesoo Song , Joerg Aichelin , Elena Bratkovskaya

A coupled-channel (CC) approach has been developed to investigate kaon photoproduction on the nucleon. In addition to direct K+ Lambda production, our CC approach accounts for strangeness production including K+ Lambda final state…

Nuclear Theory · Physics 2009-11-07 Wen-Tai Chiang , F. Tabakin , T. -S. H. Lee , B. Saghai

We study the strangeness production in antiproton-nucleus collisions at the beam momenta from 200 MeV/c to 15 GeV/c within the Giessen Botzmann-Uehling-Uhlenbeck (GiBUU) transport model. The GiBUU model contains a very detailed description…

Nuclear Theory · Physics 2013-05-30 A. B. Larionov , T. Gaitanos , U. Mosel

The $\gamma p \to K^+ \pi^0 \Lambda$ and $\gamma p \to K^+ \pi \Sigma $ reactions are studied in the kinematic region where the $\pi^0 \Lambda$(1116) and $\pi\Sigma$(1192) pairs originate dominantly from the decay of the $\Sigma$(1385) and…

Nuclear Theory · Physics 2010-12-16 Matthias F. M. Lutz , Madeleine Soyeur

We study theoretically medium effects on $\Xi^-$ production in the ($K^-$, $K^+$) reaction, using the optimal Fermi-averaging procedure which describes the Fermi motion of a nucleon on the on-energy-shell $K^-p\to K^+\Xi^-$ reaction…

Nuclear Theory · Physics 2020-08-26 Toru Harada , Yoshiharu Hirabayashi

In this study, applying the effective Lagrangian approach, we investigate the reaction $\pi^-p\rightarrow K^{*}\Sigma$ to explore the production of the hidden-strange molecular pentaquarks $P_{s\bar{s}}$. Specifically, we analyze two…

High Energy Physics - Phenomenology · Physics 2025-02-17 Xiao-Yun Wang , Yuan Gao , Xiang Liu

We analyze recent $K^+$ meson photoproduction data from the CLAS collaboration for the reactions $\gamma p\rightarrow K^+\Lambda$ and $\gamma p\rightarrow K^+\Sigma_0$, fitting measured forward-angle differential cross sections to the form…

High Energy Physics - Phenomenology · Physics 2017-10-11 Adam Freese , Daniel Puentes , Shankar Adhikari , Rafael Badui , Lei Guo , Brian Raue

A model calculation for the reactions $pp\to p\Lambda K^+$ and $pp\to N\Sigma K$ near their thresholds is presented. It is argued that the experimentally observed strong suppression of $\Sigma^0$ production compared to $\Lambda$ production…

Nuclear Theory · Physics 2009-11-06 A. M. Gasparian , J. Haidenbauer , C. Hanhart , L. Kondratyuk , J. Speth

The reaction pp -> d K^+ K^0-bar has been investigated at excess energies Q = 47.4 and 104.7 MeV above the K^+ K^0-bar threshold at COSY-Juelich. Coincident dK^+ pairs were detected with the ANKE spectrometer, and events with a missing…

We study the $\bar D D$ (${\bar D}^0 D^0$ and $D^-D^+$) charm meson pair production in antiproton (${\bar p}$) induced reactions on nuclei at beam energies ranging from threshold to several GeV. Our model is based on an effective Lagrangian…

Nuclear Theory · Physics 2016-11-02 R. Shyam , K. Tsushima

A coupled channel model with $\gamma N$, $KY$ and $\pi N$ channels has been used to analyze the recent data of $\gamma p \to K^+ \Lambda$. The non-resonant interactions within the subspace $KY \oplus \pi N$ are derived from effective…

Nuclear Theory · Physics 2017-08-23 B. Julia-Diaz , B. Saghai , T. -S. H. Lee , F. Tabakin

We investigate double $\phi$ production in $\bar{p}p$ reactions near threshold using an effective Lagrangian approach, highlighting a significant OZI rule violation through hadronic processes. Our model includes $t$- and $u$-channel…

High Energy Physics - Phenomenology · Physics 2025-05-16 Dayoung Lee , Seung-il Nam , Jung Keun Ahn