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Dilepton production in relativistic heavy-ion collisions is studied within the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach, which is based on a dynamical quasiparticle model (DQPM) matched to reproduce lattice QCD…

Nuclear Theory · Physics 2015-05-20 O. Linnyk , W. Cassing , E. L. Bratkovskaya , J. Manninen

We present the results of the experimental study of the reaction of dipion production by the beam of the negative pions with momentum 1.78 GeV/c on the polarized proton and liquid hydrogen targets. The experiment covers the region of dipion…

Very recent data for the reaction gamma+d ->eta np, namely total cross sections, angular and momentum spectra, are analyzed within a model that includes contributions from the impulse approximation and next order corrections due to the np…

Nuclear Theory · Physics 2009-11-07 A. Sibirtsev , S. Schneider , Ch. Elster , J. Haidenbauer , S. Krewald , J. Speth

We study dilepton, proton-antiproton and diphoton production in ultraperipheral lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 and 5.5 TeV. The nuclear calculations are based on equivalent photon approximation in the impact…

High Energy Physics - Phenomenology · Physics 2017-11-01 Mariola Klusek-Gawenda , Antoni Szczurek

In continuation of our perusal of the studies on transverse momentum spectra for the main varieties of secondaries from a consistent and comprehensive phenomenological approach, we propose to take up here -- after a successful completion of…

High Energy Physics - Phenomenology · Physics 2009-11-10 Bhaskar De , S. Bhattacharyya

We present a study of the exclusive production of meson pairs in the four-body $pp \to pp \pi^{+} \pi^{-}$, $pp K^{+}K^{-}$ reactions at high energies which constitute an irreducible background to resonance states (e.g. $\phi$,…

High Energy Physics - Phenomenology · Physics 2012-12-18 Piotr Lebiedowicz , Antoni Szczurek

We use QCD to compute the cross section for coherent production of a di-jet (treated as a $q\bar q$ moving at high relative transverse momentum,$\kappa_t $). In the target rest frame,the space-time evolution of this reaction is dominated by…

High Energy Physics - Phenomenology · Physics 2009-10-31 L. Frankfurt , G. A. Miller , M. Strikman

Observables in proton-deuteron scattering are sensitive probes of the nucleon-nucleon interaction and three-nucleon force effects. Several facilities, including the KVI, allow a detailed study of few-nucleon interactions below the…

Nuclear Experiment · Physics 2009-08-19 J. G. Messchendorp

The two-pion production reaction $\vec{p}p\to pp\pi^+\pi^-$ was measured with a polarized proton beam at $T_p \approx$ 750 and 800 MeV using the short version of the COSY-TOF spectrometer. The implementation of a delayed pulse technique for…

Hard exclusive reactions initiated by pion or photon beams within the near-backward kinematical regime specified by the small Mandelstam variable $-u$ can be studied to access pion-to-nucleon and photon-to-nucleon Transition Distribution…

High Energy Physics - Phenomenology · Physics 2023-05-31 Bernard Pire , Kirill M. Semenov-Tian-Shansky , Alisa A. Shaikhutdinova , Lech Szymanowski

Heavy meson production in nucleon-nucleon collisions is discussed within a meson exchange model of hadronic interactions, paying special attention to the basic dynamics that determine the behavior of the cross sections near the threshold…

Nuclear Theory · Physics 2007-05-23 K. Nakayama

A model for exclusive diffractive resonance production in proton-proton collisions at LHC energies is presented. This model is based on the convolution of the Donnachie-Landshoff parameterisation of Pomeron flux in the proton with the…

High Energy Physics - Phenomenology · Physics 2016-12-21 Roberto Fiore , Laszlo Jenkovszky , Rainer Schicker

We discuss exclusive central diffractive production of scalar ($f_{0}(980)$, $f_{0}(1370)$, $f_{0}(1500)$), pseudoscalar ($\eta$, $\eta'(958)$), and vector ($\rho^{0}$) mesons in proton-proton collisions. We show that high-energy central…

High Energy Physics - Phenomenology · Physics 2014-07-15 Piotr Lebiedowicz , Otto Nachtmann , Antoni Szczurek

We discuss consequences of the models of "tensorial pomeron" and "vectorial pomeron" for exclusive diffractive production of scalar and pseudoscalar mesons in proton-proton collisions. Diffractive production of $f_{0}(980)$, $f_{0}(1370)$,…

High Energy Physics - Phenomenology · Physics 2015-06-17 Piotr Lebiedowicz , Otto Nachtmann , Antoni Szczurek

The lepton pair production via the quark-antiquark annihilation subprocess in collisions of beam antiproton with the proton target at E_beam = 14 GeV (which corresponds to the center-of-mass energy of the p pbar system E_cm = 5.3 GeV) is…

High Energy Physics - Phenomenology · Physics 2011-09-01 A. N. Skachkova

Production and in-medium modification of hidden strange $\phi$ mesons are studied in proton-nucleus reactions - p+C, p+Cu and p+Pb - at 12 GeV/c, partially measured by the KEK E325 collaboration via the dilepton decay mode. This work is…

High Energy Physics - Phenomenology · Physics 2024-08-29 Philipp Gubler , Masaya Ichikawa , Taesoo Song , Elena Bratkovskaya

This article presents the first measurement of the (anti)deuteron and antiproton transverse-momentum distributions, the deuteron coalescence parameter, and the ratio between the yields of deuteron and proton in and out of jets in p-Pb…

Nuclear Experiment · Physics 2026-02-27 ALICE Collaboration

The contribution of the box and crossed two-pion-exchange diagrams to proton-proton scattering at 90$^{\circ}_{c.m.}$ is calculated in the laboratory momentum range up to 12 GeV/c. Relativistic form factors related to the nucleon and pion…

Nuclear Theory · Physics 2008-11-26 W. R. Gibbs , B. Loiseau

The production of deuterons and antideuterons in the transverse momentum range 1.1 < p_T < 4.3 GeV/c at mid-rapidity in Au + Au collisions at sqrt(s_NN)=200 GeV has been studied by the PHENIX experiment at RHIC. A coalescence analysis…

Nuclear Experiment · Physics 2008-11-26 PHENIX Collaboration , S. S. Adler

We use a recently developed model of relativistic meson-exchange currents to compute the neutron-proton and proton-proton yields in $(\nu_\mu,\mu^-)$ scattering from $^{12}$C in the 2p-2h channel. We compute the response functions and cross…

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