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In the framework of general two-Higgs-doublet models, we calculate the branching ratios of various inclusive charmless b decays by using the low energy effective Hamiltonian including next-to-leading order QCD corrections, and examine the…

高能物理 - 唯象学 · 物理学 2009-10-31 Zhenjun Xiao , Chong Sheng Li , Kuang-Ta Chao

Measurements of open charm production cross sections in deep-inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections sigma_red^{c\bar{c}} for charm production are obtained in the kinematic…

高能物理 - 实验 · 物理学 2012-11-13 H1 Collaboration , ZEUS Collaboration

Elliptic flow of charm hadrons is investigated based on the quark coalescence model. Due to the large difference between the charm quark and light quark masses, hadrons containing both light and charm quarks show a qualitatively different…

核理论 · 物理学 2009-11-10 Zi-wei Lin , Denes Molnar

We present first results on the topological reconstruction of open charm mesons in p+p collisions at $\snn$ = 200 GeV using electron tagging. The analysis makes use of the full acceptance of the STAR electromagnetic calorimeter during Run…

核实验 · 物理学 2007-05-23 Andre Mischke

We discuss the production of charmonium and open charm in nuclear collisions at SPS/FAIR energies within the framework of the statistical hadronization model. The increasing importance at lower energies of Lambda_c production is discussed…

核理论 · 物理学 2008-11-26 A. Andronic , P. Braun-Munzinger , K. Redlich , J. Stachel

We investigate open charm meson production in fixed-target LHCb experiment at $\sqrt{s}=86.6$ GeV in $p+^4\!\mathrm{He}$ collisions. Theoretical calculations of charm cross section are done in the framework of the $k_{T}$-factorization…

高能物理 - 唯象学 · 物理学 2020-07-22 Rafal Maciula

LHCb has started its charm physics programme using the data taken at the LHC. The first measurements of open charm production cross-sections for proton proton collisions at $\sqrt{s}=7 \tev$ are presented. The cross-sections of the \PDzero,…

高能物理 - 实验 · 物理学 2010-12-17 Marco Gersabeck

We study open charm hadrons production in pp and Au+Au collisions at $\sqrt{s_{\mathrm{NN}}} = 200$~GeV using an improved a multi-phase transport (AMPT) model. Specifically, we show the transverse-momentum spectra and nuclear modification…

高能物理 - 唯象学 · 物理学 2026-01-21 Bijun Fan , Chao Zhang , Liang Zheng , Shusu Shi

Open charm production in gamma-gamma collisions is studied with data collected at e+e- centre-of-mass energies from 189 GeV to 202 GeV corresponding to a total integrated luminosity of 410 pb-1. The charm cross section sigma(gamma gamma…

高能物理 - 实验 · 物理学 2012-08-27 L3 Collaboration

We present a detailed phenomenological study of the prospects of open charm physics at the future $\bar{p}p$ and $pp$ facilities GSI-FAIR and J-PARC, respectively. In particular, we concentrate on differential cross sections and the charge…

高能物理 - 唯象学 · 物理学 2008-11-26 J. Riedl , A. Schafer , M. Stratmann

A reaction model for $\gamma + p \to J/\psi + p$ photoproduction, which exposes the $c \bar c$ content of the photon in making the transition $\gamma\to c\bar c + \mathbb P \to J/\psi$ and couples the intermediate $c \bar c$ system to the…

高能物理 - 唯象学 · 物理学 2024-07-26 Lin Tang , Yi-Xuan Yang , Zhu-Fang Cui , Craig D. Roberts

We study the production of charm mesons and other charm baryons from quark matter at CERN SPS and RHIC energies. Using quark coalescence models as hadronization mechanism, we predict particle ratios, absolute yields and transverse momentum…

核理论 · 物理学 2008-11-26 P. Levai , T. S. Biro , P. Csizmadia , T. Csorgo , J. Zimanyi

Using a quark combination model with the equal-velocity combination approximation, we study the production of hadrons with strangeness and charm flavor quantum numbers in Pb+Pb collisions at $\sqrt{s_{NN}}=$5.02 TeV. We present analytical…

核理论 · 物理学 2023-02-16 Wen-bin Chang , Rui-qin Wang , Jun Song , Feng-lan Shao , Qun Wang , Zuo-tang Liang

We present recent results from charmonium and open charm production at the LHCb experiment at CERN, Geneva. We concentrate on studies for the measurement of the cross section pp ->JPsi+X in its decay channel with two muons, showing the…

高能物理 - 实验 · 物理学 2011-03-02 Giulia Manca

The phenomenological analysis of the LHC data on transverse momentum spectrum and elliptic flow of $J/\psi$ and D mesons in PbPb collisions at center-of-mass energy 2.76 TeV per nucleon pair is presented. The charmed meson production…

高能物理 - 唯象学 · 物理学 2016-02-17 I. P. Lokhtin , A. V. Belyaev , G. Kh. Eyyubova , G. Ponimatkin , E. Yu. Pronina

We review the quark coalescence model for hadronization in relativistic heavy ion collisions and show how it can explain the observed large baryon to meson ratio at intermediate transverse momentum and scaling of the elliptic flows of…

核理论 · 物理学 2009-11-10 V. Greco , C. M. Ko

The Standard Model predicts CP asymmetries in charm decays of $O(10^{-3})$ and the observation of significantly larger CP violation could indicate non-Standard Model physics effects. During 2011 and 2012, the LHCb experiment collected a…

高能物理 - 实验 · 物理学 2019-08-14 Evelina Gersabeck

We study open charm flavor observables in Pb+Pb collision at $\sqrt{s_{NN}}= 2.76$ TeV within the MARTINI framework. The space-time expansion of the quark-gluon plasma is described using the hydrodynamical approach-MUSIC with IP-Glasma…

核理论 · 物理学 2023-11-09 Mayank Singh , Manu Kurian , Sangyong Jeon , Charles Gale

In this work we present our model that dynamically generates resonances from charmed and light pseudoscalar and vector mesons. The model generates a rich spectrum of charmed and hidden charm scalar and axial resonances, most of them which…

高能物理 - 唯象学 · 物理学 2009-05-12 D. Gamermann , E. Oset , B. S. Zou

The multiplicity distributions of hadrons produced in central nucleus-nucleus collisions are studied within the hadron-resonance gas model in the large volume limit. The microscopic correlator method is used to enforce conservation of three…

核理论 · 物理学 2008-11-26 V. V. Begun , M. Gazdzicki , M. I. Gorenstein , M. Hauer , V. P. Konchakovski , B. Lungwitz