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Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton-proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb$^{-1}$,…

高能物理 - 实验 · 物理学 2024-12-13 ATLAS Collaboration

Associated production of charged gauge bosons and charged charmed mesons at the LHC is considered in the framework of $k_T$-factorization approach. Theoretical predictions are compared with ATLAS data, and reasonably good agreement is…

高能物理 - 唯象学 · 物理学 2015-05-20 S. P. Baranov , A. V. Lipatov , M. A. Malyshev , A. M. Snigirev , N. P. Zotov

The production of fully-heavy tetraquark states in proton-proton ($pp$) and proton-nucleus ($pA$) collisions at the center-of-mass energies of the Large Hadron Collider (LHC) and at the Future Circular Collider (FCC) is investigated…

高能物理 - 唯象学 · 物理学 2023-06-23 L. M. Abreu , F. Carvalho , J. V. C. Cerqueira , V. P. Goncalves

We study the production of charmonia and charmed hadrons in nucleus-nucleus collisions at SPS, RHIC, and LHC energies within the framework of the statistical hadronization model. Results from this model are compared to the measured yields…

核理论 · 物理学 2015-06-26 A. Andronic , P. Braun-Munzinger , K. Redlich , J. Stachel

We calculate the inclusive and diffractive photoproduction of heavy quarks in proton-proton collisions at Tevatron and LHC energies, where the photon reaches energies larger than those ones accessible at DESY-HERA. The integrated cross…

高能物理 - 唯象学 · 物理学 2009-09-02 V. P. Goncalves , M. V. T. Machado , A. R. Meneses

We investigate the potential to observe double parton scattering at the Large Hadron Collider in p p -> W b bbar X -> l nu b bbar X at 7 TeV. Our analysis tests the efficacy of several kinematic variables in isolating the double parton…

高能物理 - 唯象学 · 物理学 2011-11-01 Edmond L. Berger , C. B. Jackson , Seth Quackenbush , Gabe Shaughnessy

Using an effective hadronic Lagrangian with physical hadron masses and coupling constants determined either empirically or from SU(4) flavor symmetry, we study the production cross sections of charm mesons from pion and rho meson…

核理论 · 物理学 2009-11-07 W. Liu , C. M. Ko

We study charm production in ultra-relativistic heavy-ion collisions by using the Parton-Hadron-String Dynamics (PHSD) transport approach. The initial charm quarks are produced by the Pythia event generator tuned to fit the transverse…

Recent experimental studies of the multiplicity dependence of heavy quark (HQ) production in proton-proton collisions at 7 TeV showed a strong non-linear increase of the HQ multiplicity as a function of the charged particle multiplicity. We…

核理论 · 物理学 2016-09-21 K. Werner , B. Guiot , Iu. Karpenko , T. Pierog , G. Sophys

Charm production in pp collisions is considered in the framework of perturbative QCD. The values of two parameters, the charm quark mass $m_c$ and the QCD scale mu^2, are determined from the comparison of the theoretical calculations with…

高能物理 - 唯象学 · 物理学 2011-03-17 C. Merino , C. Pajares , M. M. Ryzhinskiy , Yu. M. Shabelski , A. G. Shuvaev

The first measurement of the inclusive cross section for top quark pairs ($\mathrm{t\bar{t}}$) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of $\mathrm{t\bar{t}}$ events…

高能物理 - 实验 · 物理学 2021-08-13 CMS Collaboration

We discuss diffractive production of open charm and bottom mesons at the LHC. The differential cross sections for single- and central-diffractive mechanisms for $c\bar c$ and $b\bar b$ pair production are calculated in the framework of the…

高能物理 - 唯象学 · 物理学 2015-03-25 Marta Luszczak , Rafal Maciula , Antoni Szczurek

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

高能物理 - 唯象学 · 物理学 2016-11-11 I. P. Lokhtin , A. V. Belyaev , G. Kh. Eyyubova , G. Ponimatkin , E. Yu. Pronina

The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of…

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

We consider the production of electroweak $Z$ or $W^\pm$ bosons associated with $J/\psi$ mesons at the LHC conditions. Our attention is focused on new partonic subprocesses which yet have never been considered in the literature, namely, the…

高能物理 - 唯象学 · 物理学 2021-08-25 S. P. Baranov , A. V. Lipatov , A. A. Prokhorov

Recent results related to Double-Parton Scattering (DPS) and Multi-Parton Interactions (MPI) from the LHC experiments (ALICE, ATLAS, CMS and LHCb) are reviewed and discussed together with a brief overview of relevant literature. The robust…

高能物理 - 实验 · 物理学 2014-09-15 P. Antonioli

We discuss the production mechanism of a new state, a putative fully charm tetraquark, observed recently by the LHCb at M = 6.9 GeV in the $J/\psi J/\psi$ channel. Both single parton scattering (SPS) and double parton scattering (DPS)…

高能物理 - 唯象学 · 物理学 2020-12-16 Rafał Maciuła , Wolfgang Schäfer , Antoni Szczurek

We present a phenomenological study of charm quark photoproduction in longitudinally polarized lepton-hadron collisions at next-to-leading order accuracy of QCD. Our results are based on a recently developed, flexible parton-level Monte…

高能物理 - 唯象学 · 物理学 2015-06-12 Johann Riedl , Marco Stratmann , Andreas Schafer

We discuss production of charm quarks and mesons as well as nonphotonic electrons in $pp$ scattering at RHIC. The distributions in rapidity and transverse momentum of charm and bottom quarks/antiquarks are calculated in the…

高能物理 - 唯象学 · 物理学 2011-12-12 Antoni Szczurek

We present first results for the $2 \to 4$ single-parton scattering $g g \to c \bar c c \bar c$ subprocess for the first time fully within the $k_t$-factorization approach. In this calculation we have used the Kimber-Martin-Ryskin…

高能物理 - 唯象学 · 物理学 2015-07-01 Andreas van Hameren , Rafal Maciula , Antoni Szczurek