11,989 research outputs found
Investigating the inclusive transverse spectra in high-energy collisions in the context of geometric scaling framework
The presence of geometric scaling within the spectra of produced
hadrons at high energy collisions using small- -factorization is
investigated. It is proposed a phenomenological parameterization for the
unintegrated gluon distribution in the scaling range which reproduces the
features of the differential cross section both in the saturated and dilute
perturbative QCD regimes. As the saturation scale acts as an effective
regulator of the infrared region (IR), the extension of the model to quantities
usually associated to soft physics is studied. The approach is applied to
compute the average and the rapidity distribution of produced gluons at
high energies.Comment: 11 pages, 9 figure
Estimations for the Single Diffractive production of the Higgs boson at the Tevatron and the LHC
The single diffractive production of the standard model Higgs boson is
computed using the diffractive factorization formalism, taking into account a
parametrization for the Pomeron structure function provided by the H1
Collaboration. We compute the cross sections at next-to-leading order accuracy
for the gluon fusion process, which includes QCD and electroweak corrections.
The gap survival probability () is also introduced to account for
the rescattering corrections due to spectator particles present in the
interaction, and to this end we compare two different models for the survival
factor. The diffractive ratios are predicted for proton-proton collisions at
the Tevatron and the LHC for the Higgs boson mass of = 120 GeV.
Therefore, our results provide updated estimations for the diffractive ratios
of the single diffractive production of the Higgs boson in the Tevatron and LHC
kinematical regimes.Comment: 20 pages, 6 figures, 3 table
Role of nuclear gluon distribution on particle production in heavy ion collisions
The transverse momentum spectra of hadrons is calculated from the
unintegrated gluon distribution (UGD) within the -factorization framework
at small . Starting from collisions, the modification caused by the
nuclear medium is incorporated in the UGD at high energies, which is related to
the nuclear shadowing phenomenon. Moreover, we consider that particle
production from minijet decaying is not enough to explain the spectra in
collisions due to collective phenomena that take place after the hard
collision. The Boltzmann-Gibbs Blast Wave (BGBW) distribution is utilized in
order to evaluate the distribution of particle production in equilibrium. Data
from ALICE collaboration for collisions at TeV are
analyzed and the nuclear modification factor for pion production is computed.Comment: 8 pages, 5 figure
Investigating the diffractive gluon jet production in lepton-ion collisions
We study the diffractive jet production in electron-ion collisions in the
kinematical region where the mass of the diffractive final state is
larger than . Based on parton saturation framework predictions are done
for the kinematics of future or possible machines as the EIC, LHeC,
HE-LHeC and FCC-eA. We analyze the differential cross section as a function of
jet (gluon) transverse momentum and from the experimental point of view this
observable could be used to extract the saturation scale as a function of
.Comment: 8 pages, 5 figures. To be published in Physical Review
Dilepton production through timelike Compton scattering within the -factorization approach
In this work we consider the dilepton production via timelike Compton
scattering (TCS) in electron-proton and proton-proton collisions. In
particular, the differential cross section in terms of the dilepton invariant
mass and rapidity is computed within the -factorization approach. Besides,
we utilize distinct unintegrated gluon distributions (UGD) in order to compare
their impact on the differential cross section of TCS in () collisions
evaluated at the LHC (LHeC), HL-LHC (LHeC), HE-LHC (LHeC) and FCC-hh (eh)
center-of-mass energies.Comment: 9 pages, 4 figure
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