arXiv subjects
Publications and source records attributed to Sergey Koshkarev.
Using the GS09 model we predict the possible impact of the parton momentum correlation on the $J/ψ$-pair production at the Spin Physics Detector at the Nuclotron-based Ion Collider Facility. The double $J/ψ$ production and the effective cross sections are calculated.
In this paper we conduct a phenomenological study for the search of evidence for the intrinsic charm mechanism in double $J/ψ$ production at the COMPASS experiment using the CERN $π^-$ beam at 190 GeV/c. We also re-review the double $J/ψ$ production data provided by the NA3 experiment using the CERN $π^-$ beam at 150 and 280 GeV/c with incident on a platinum target.
In this paper we discuss the impact of the Double Parton Scattering (DPS) mechanism for the production of $J/ψ$ pairs at the COMPASS energy. We find that the kinematics suppresses the DPS cross section by a factor of $\sim1/2$. The upper limit for the double $J/ψ$ production DPS cross section at the COMPASS energy is estimated. The Feynman-$x$ distributions of double $J/ψ$ production with the CERN $π^-$ beam are presented.
In this note we provide a detailed derivation of the kinematic limit of the charm production in fixed-target experiments with the intrinsic charm coming from the target. In addition, we discuss the first measurement of charm quark production in the fixed-target configuration at the LHC.
In this paper we review the hadroproduction mechanisms of double-charm baryons for the different experimental environments and reinterpret the SELEX and LHCb results.
In this note we analyse the structure of the baryonic state $|[qc]c\rangle$ with a spin-0 diquark $[qc]$, as compared to baryonic states $|(qc)c\rangle$ and $|q(cc)\rangle$ containing internal spin-1 diquark states. While one can identify the state $|q(cc)\rangle$ with the state observed at LHCb, the state $|(qc)c\rangle$ could probably be part of the state $Ξ_{cc}^{++}(3780)$. Accordingly, the ground state of $|[qc]c\rangle$ can be identified with the state $Ξ_{cc}^+(3520)$.
In this paper we review existing data and analyze experimental opportunities for modern experiments to investigate the signals of intrinsic heavy quarks.
We investigate the production cross sections, momentum distributions and rapidity distributions for doubly charmed baryons which according to the intrinsic heavy quark mechanism are produced nearly at rest. These events should be measurable at fixed-target experiments like STAR@RHIC and AFTER@LHC.
In the paper we discuss contribution of the doubly intrinsic heavy mechanism into the production of $B_c$ meson, the doubly heavy baryons and the all-charm tetraquark at a future fixed-target experiment at the LHC (AFTER@LHC). The production cross sections and the mean values of Feynman-x for the finale states are presented.
In this paper we give estimates for the proton--proton cross sections into pairs of quarkonium states $J/ψ$, $ψ(2S)$, $Υ(1S)$ and $Υ(2S)$ at the scheduled AFTER@LHC energy of $115$GeV. The estimates are based on the intrinsic heavy flavor mechanism which is observable for high values of $x_F$, a range outside the dominance of single parton and double parton scattering.
The high production rate and $\langle x_{F} \rangle > 0.33$ of the doubly charmed baryons measured by the SELEX experiment is not amenable to perturbative QCD analysis. In this paper we calculate the production of the doubly heavy baryons with the double intrinsic charm Fock states whose existence is rigorously predicted by QCD. The production rate and the longitudinal momentum distribution are both reproduced. We also show that the production rates of the doubly charmed baryons and double $J/ψ$ production observed by NA3 collaboration are comparable. Recent experimental results are reviewed. The production cross section of the doubly charmed baryons at a fixed-target experiment at the LHC is presented.
This paper focuses on disagreement between theoretical predictions and the SELEX results of the production properties of Doubly Charmed Baryons. The role of the intrinsic charm mechanism in the SELEX kinematic region is researched. The production ratio of the $Ξ_{cc}^+$ baryon in the SELEX kinematic region is presented. The recent experimental results are reviewed.
This paper focuses on disagreement between theoretical predictions and experimental results of the production properties of Doubly Charmed Baryons. The kinematic dependencies were used to clarify the discrepancy between the SELEX data and the theory. The production ratio of the $Ξ_{cc}^+$ baryon in the SELEX kinematic region is presented. The recent experimental results are reviewed.
This paper focuses on disagreement between theoretical predictions and experimental results of the production properties of Bc meson. Hadronic decays of Bc are used to separate predictions of production cross section and predictions of branching ratio. The branching ratios of Bc decays to J/psi + πand to J/psi + 3πare also presented.