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A unitary coupled-channel effective Lagrangian model is applied to the combined analysis of the $(\pi,\gamma) N \to K\Lambda$ reactions in the energy region up to 2 GeV. To constrain the resonance couplings to the $K\Lambda$ final state the…

Nuclear Theory · Physics 2008-11-26 V. Shklyar , H. Lenske , U. Mosel

We study the charmed baryon production reaction ${\bar p} p \to {\bar \Lambda}_c^- \Lambda_c^+$ using the $t$-channel $D^0$ and $D^{*0}$ meson exchange diagrams within an effective Lagrangian model involving the physical hadron masses and…

High Energy Physics - Phenomenology · Physics 2014-07-15 R. Shyam , H. Lenske

We study neutrino-induced meson productions off the nucleon in the forward limit by applying the PCAC hypothesis to our dynamical coupled-channels (DCC) model. The DCC model reasonably describes pi N, gamma N -> pi N, eta N, K Lambda, K…

High Energy Physics - Phenomenology · Physics 2013-09-16 S X Nakamura , H Kamano , T S H Lee , T Sato

We investigate the $pp \to pK^{+}\Lambda$ reaction within an effective Lagrangian model where the contributions to the amplitudes are taken into account within the tree level. The initial interaction between the two nucleons is modeled by…

Nuclear Theory · Physics 2009-10-31 R. Shyam

We investigate the production of a cascade hyperon (Xi) through the K^- + p --> K^+ (K^0) + Xi^- (Xi^0) reactions, within an effective Lagrangian model where these reactions proceed via excitations of Lambda and Sigma resonance intermediate…

High Energy Physics - Phenomenology · Physics 2015-03-19 R. Shyam , O. Scholten , A. W. Thomas

We investigate the p(gamma,K+)Lambda and p(gamma,K+)Sigma^0 reactions within a coupled-channels effective-Lagrangian method which is based on the K-matrix approach. The two-body final channels included are pi-N, eta-N, phi-N, rho-N,…

High Energy Physics - Phenomenology · Physics 2010-04-06 R. Shyam , O. Scholten , H. Lenske

Photo- and electroproduction of $K\Sigma$ have been investigated near their production thresholds by using an effective Lagrangian approach. For this purpose, the background amplitude is constructed from suitable Feynman diagrams, whereas…

Nuclear Theory · Physics 2015-06-23 T. Mart

The new $\gamma n\to K^0\Lambda$ data obtained from the CLAS and MAMI collaborations are analyzed by employing an effective Lagrangian method. The constructed model can describe all available experimental data in both $\gamma p \to…

High Energy Physics - Phenomenology · Physics 2019-09-18 T. Mart

We study the $\gamma p \to p f_0$ [$f_0(980)$ and $f_0(1500)$] reaction close to threshold within an effective Lagrangian approach. The production process is described by $s$-channel nucleon pole or $t$-channel $\rho$ and $\omega$ exchange.…

High Energy Physics - Phenomenology · Physics 2018-11-21 Hanyang Xing , Chun-Sheng An , Ju-Jun Xie , Gang Li

Hadron production ($\pi^\pm$, proton, $\Lambda$, $K_S^0$, $K^\pm$) in $\pi^- + \mathrm{C}$ and $\pi^- + \mathrm{W}$ collisions is investigated at an incident pion beam momentum of $1.7~\mathrm{GeV}/c$. This comprehensive set of data…

Nuclear Experiment · Physics 2023-02-21 R. Abou Yassine , J. Adamczewski-Musch , O. Arnold , E. T. Atomssa , M. Becker , C. Behnke , J. C. Berger-Chen , A. Blanco , C. Blume , M. Böhmer , L. Chlad , P. Chudoba , I. Ciepał , C. Deveaux , D. Dittert , J. Dreyer , E. Epple , L. Fabbietti , P. Fonte , C. Franco , J. Friese , I. Fröhlich , J. Förtsc , T. Galatyuk , J. A. Garzón , R. Gernhäuser , R. Greifenhagen , M. Grunwald , M. Gumberidze , S. Harabasz , T. Heinz , T. Hennino , C. Höhne , F. Hojeij , R. Holzmann , M. Idzik , B. Kämpfer , K-H. Kampert , B. Kardan , V. Kedych , I. Koenig , W. Koenig , M. Kohls , J. Kolas , B. W. Kolb , G. Korcyl , G. Kornakov , R. Kotte , W. Krueger , A. Kugler , T. Kunz , R. Lalik , K. Lapidus , S. Linev , F. Linz , L. Lopes , M. Lorenz , T. Mahmoud , L. Maier , A. Malige , J. Markert , S. Maurus , V. Metag , J. Michel , D. M. Mihaylov , V. Mikhaylov , A. Molenda , C. Müntz , R. Münzer , M. Nabroth , L. Naumann , K. Nowakowski , J. Orliński , J. -H. Otto , Y. Parpottas , M. Parschau , C. Pauly , V. Pechenov , O. Pechenova , K. Piasecki , J. Pietraszko , T. Povar , A. Prozorov , W. Przygoda , K. Pysz , B. Ramstein , N. Rathod , P. Rodriguez-Ramos , A. Rost , A. Rustamov , P. Salabura , T. Scheib , N. Schild , K. Schmidt-Sommerfeld , H. Schuldes , E. Schwab , F. Scozzi , F. Seck , P. Sellheim , J. Siebenson , L. Silva , U. Singh , J. Smyrski , S. Spataro , S. Spies , M. Stefaniak , H. Ströbele , J. Stroth , P. Strzempek , C. Sturm , K. Sumara , O. Svoboda , M. Szala , P. Tlusty , M. Traxler , H. Tsertos , O. Vazquez-Doce , V. Wagner , A. A. Weber , C. Wendisch , M. G. Wiebusch , J. Wirth , H. P. Zbroszczyk , E. Zherebtsova , P. Zumbruch , C. Curceanu , K. Piscicchia , A. Scordo

A relativistic and non-local model for the coherent photoproduction of pions on spin-zero nuclei is presented. The production operator is derived from an effective Lagrangian model that contains all the degrees of freedom known to…

Nuclear Theory · Physics 2009-10-31 W. Peters , H. Lenske , U. Mosel

We report on calculation of the $\Lambda$ - hypernuclear production induced by the stopped $K^-$. The calculation was performed within the framework of the distorted wave impulse approximation and employed chirally motivated model for the…

Nuclear Theory · Physics 2014-11-20 V. Krejčiřík , A. Cieplý

We investigate the photoproduction of Lambda(1405,1/2^-) = Lambda* off the proton target using the effective Lagrangian in the Born approximation. We observed that, depending on the choice of the K* N Lambda* coupling strength, the total…

High Energy Physics - Phenomenology · Physics 2011-07-01 Seung-il Nam , Ji-Hyoung Park , Atsushi Hosaka , Hyun-Chul Kim

We study the mechanism of the associated Lambda-kaon and Sigma-kaon production in nucleon-nucleon collisions over an extended range of near threshold beam energies within an effective Lagrangian model, to understand of the new data on pp…

Nuclear Theory · Physics 2009-11-11 Radhey Shyam

We study forward neutrino-induced meson production off the nucleon in the resonance region. Our calculation is based on a dynamical coupled-channels (DCC) model that reasonably describes pi (gamma) N -> pi N, eta N, K Lambda, K Sigma data…

High Energy Physics - Phenomenology · Physics 2015-05-20 S. X. Nakamura , H. Kamano , T. -S. H. Lee , T. Sato

We report the measurement of the $\gamma p \rightarrow K^{+}\Lambda$ and $\gamma p \rightarrow K^{+}\Sigma^{0}$ reactions at SPring-8. The differential cross sections and photon-beam asymmetries are measured at forward $K^{+}$ production…

We present a Regge-inspired effective-Lagrangian framework for charged-kaon photoproduction from the deuteron. Quasi-free kaon production is investigated using the Regge-plus-resonance elementary operator within the non-relativistic…

Nuclear Theory · Physics 2014-11-20 Pieter Vancraeyveld , Lesley De Cruz , Jan Ryckebusch , Tim Van Cauteren

In this work the roles of the nucleon resonances in the $\Lambda$(1520) photoproduction off proton target are investigated within the effective Lagrangian method. Besides the Born terms,including contact term, $s$-, $u$- and $K$ exchanged…

Nuclear Theory · Physics 2015-04-27 Jun He , Xu-Rong Chen

In this work we study the $\Sigma\pi$ and $\Lambda\pi$ production off free nucleons driven by the strangeness-changing weak charged current. We calculate the total cross sections for all possible channels and estimate the flux-averaged…

High Energy Physics - Phenomenology · Physics 2021-10-14 M. Benitez Galan , M. Rafi Alam , I. Ruiz Simo

Kaon photo-production process on $^{12}$C has been studied by measuring neutral kaons in a photon energy range of 0.8$-$1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the…