Neutron-rich hypernuclei in the chiral soliton model

Kopeliovich, V.B.

doi:10.1134/s0021364012160047

Cited by 32 publications

(69 citation statements)

References 46 publications

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“…In Fig. 8 we compare the charm production cross section obtained in different underlying QCD approaches -the collinear factorization approach (solid and dotted lines), the k T -factorization approach [38][39][40][41] (dashed line) and the dipole model accounting for the saturation phenomena [43][44][45] (dash-dotted line). These distinct approaches for the heavy quark production in hadronic collisions differ in their basic assumptions and partonic pictures.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, in the color dipole formalism [43][44][45] the basic partonic picture of heavy quark production in gluongluon interactions is such that, before interacting with the hadron target, a gluon is emitted by a projectile and fluctuates into a color octet pair QQ, its lowest-order Fock component. The dipole approach does not rely on QCD factorisation [46] and is based upon the universal ingredients such as the dipole cross section and the light-cone wave function for a given Fock component of the projectile that undergoes scattering off the target nucleon.…”

Section: Resultsmentioning

confidence: 99%

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Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

et al. 2017

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We present a detailed mapping of the dominant kinematical domains contributing to the prompt atmospheric neutrino flux at high neutrino energies by studying its sensitivity to the cuts on several kinematical variables crucial for charm production in cosmic ray scattering in the atmosphere. This includes the maximal center-of-mass energy for proton-proton scattering, the longitudinal momentum fractions of partons in the projectile (cosmic ray) and target (nucleus of the atmosphere), the Feynman xF variable and the transverse momentum of charm quark/antiquark. We find that the production of neutrinos with energies larger than Eν > 10 7 GeV is particularly sensitive to the center-of-mass energies larger than the ones at the LHC and to the longitudinal momentum fractions in the projectile 10 −8 < x < 10 −5 . Clearly, these are regions where we do not control the parton, in particular gluon, densities. We also analyse the characteristic theoretical uncertainties in the charm production cross section coming from its QCD modelling. The precision data on the prompt atmospheric neutrino flux can efficiently constrain the mechanism of heavy quark production and underlying QCD dynamics in kinematical ranges beyond the reach of the current collider measurements.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

et al. 2017

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“…[25] which includes the impact parameter dependence in the dipole-nucleus amplitude and describes the experimental data on the nuclear structure function (for more details, see Ref. [19,26]).…”

Section: B Models For the Dipole Cross Sectionmentioning

confidence: 99%

Nuclear effects in Drell-Yan pair production in high-energypAcollisions

et al. 2016

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The Drell-Yan (DY) process of dilepton pair production off nuclei is not affected by final state interactions, energy loss or absorption. A detailed phenomenological study of this process is thus convenient for investigation of the onset of initial-state effects in proton-nucleus (pA) collisions. In this paper, we present a comprehensive analysis of the DY process in pA interactions at RHIC and LHC energies in the color dipole framework. We analyse several effects affecting the nuclear suppression, RpA < 1, of dilepton pairs, such as the saturation effects, restrictions imposed by energy conservation (the initial-state effective energy loss) and the gluon shadowing, as a function of the rapidity, invariant mass of dileptons and their transverse momenta pT . In this analysis, we take into account besides the γ * also the Z 0 contribution to the production cross section, thus extending the predictions to large dilepton invariant masses. Besides the nuclear attenuation of produced dileptons at large energies and forward rapidities emerging due to the onset of shadowing effects, we predict a strong suppression at large pT , dilepton invariant masses and Feynman xF caused by the Initial State Interaction effects in kinematic regions where no shadowing is expected. The manifestations of nuclear effects are investigated also in terms of the correlation function in azimuthal angle between the dilepton pair and a forward pion ∆φ for different energies, dilepton rapidites and invariant dilepton masses. We predict that the characteristic double-peak structure of the correlation function around ∆φ ≃ π arises for very forward pions and large-mass dilepton pairs.

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“…The condition for the onset of shadowing is that the coherence length exceeds the nuclear radius R A , l c ∼ > R A . This long coherence length (LCL) limit can be safely used in calculations for the RHIC and LHC energy regions especially at forward rapidities and allows to incorporate shadowing effects via eikonalization of σ N qq (ρ, x) [14], i.e. replacing in Eq.…”

Section: Direct Photons Via Color Dipole Formalismmentioning

confidence: 99%

Direct photons at largep_T: from RHIC to LHC

Cepila

Nemchik

2014

EPJ Web of Conferences

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Abstract. Using the color dipole formalism we study the production of direct photons in proton-nucleus and nucleus-nucleus collisions at energies corresponding to RHIC and LHC experiments. Prompt photons produced in a hard reaction are not accompanied with any final state interaction, either energy loss or absorption. Therefore, in the RHIC energy range besides small isotopic corrections one should not expect any nuclear effects at large p T . However, data from the PHENIX experiment indicates a significant large-p T suppression in d+Au and central Au+Au collisions that cannot be accompanied by coherent phenomena. We demonstrate that such an unexpected result is subject to the energy sharing problem universally induced by multiple initial state interactions (ISI) at large p T and/or at forward rapidities. In the LHC kinematic region ISI corrections are irrelevant at mid rapidities but cause rather strong suppression at forward rapidities. We present for the first time predictions for expected nuclear effects at large p T in p + Pb and Pb + Pb collisions at different rapidities. We include and analyze also a contribution of coherent effects associated with gluon shadowing modifying nuclear effects predominantly at small and medium-high p T .

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Neutron-rich hypernuclei in the chiral soliton model

Cited by 32 publications

References 46 publications

Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

Nuclear effects in Drell-Yan pair production in high-energypAcollisions

Direct photons at largep_T: from RHIC to LHC

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Neutron-rich hypernuclei in the chiral soliton model

Cited by 32 publications

References 46 publications

Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

Mapping the dominant regions of the phase space associated with cc¯ production relevant for the prompt atmospheric neutrino flux

Nuclear effects in Drell-Yan pair production in high-energypAcollisions

Direct photons at largepT: from RHIC to LHC

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Product

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Direct photons at largep_T: from RHIC to LHC