Numerical study of MRW-type unintegrated DPDFs constructed from GS09 non-factorized collinear DPDFs via double DGLAP evolution, comparing DMKMRW, DVO-MRW and matched variants.
Study of the hard double-parton scattering contribution to inclusive four-lepton production in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
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abstract
The inclusive production of four isolated charged leptons in $pp$ collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb$^{-1}$ of data recorded in the ATLAS detector at the LHC at centre-of-mass energy $\sqrt{s}$ = 8 TeV. In the four-lepton invariant-mass range of $80<m_{4\ell}<1000$ GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be $f_{\mathrm{DPS}} = 0.042$, which results in an estimated lower limit on the effective cross section at 95% confidence level of $1.0$ mb.
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Global fit of an x- and μ-dependent Gaussian model for transverse double parton distributions to LHC and Tevatron data extracts parameters for calculating effective cross sections in other observables.
Derived an analog pocket formula for DPS c cbar l+l- production in AA UPCs including elastic and inelastic photon contributions and presented differential cross section predictions at LHC energies.
Derives photon-energy dependent DPS effective cross section for c c-bar b b-bar production in AA UPCs and provides LHC/FCC predictions plus A dependence.
citing papers explorer
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Numerical Study of MRW-Type Unintegrated Double Parton Distribution Functions from Non-Factorized DPDFs
Numerical study of MRW-type unintegrated DPDFs constructed from GS09 non-factorized collinear DPDFs via double DGLAP evolution, comparing DMKMRW, DVO-MRW and matched variants.
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Momentum fraction and hard scale dependence of double parton scattering
Global fit of an x- and μ-dependent Gaussian model for transverse double parton distributions to LHC and Tevatron data extracts parameters for calculating effective cross sections in other observables.
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DPS mechanism for associated $c\bar{c} l^+l^-$ production in $AA$ UPCs as a probe for photon density inside the nucleus
Derived an analog pocket formula for DPS c cbar l+l- production in AA UPCs including elastic and inelastic photon contributions and presented differential cross section predictions at LHC energies.
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DPS mechanism for associated $c\bar c b\bar b$ production in $AA$ UPCs
Derives photon-energy dependent DPS effective cross section for c c-bar b b-bar production in AA UPCs and provides LHC/FCC predictions plus A dependence.