We present the NLO electroweak radiative corrections to the e^(+)e^(−)γ production in γγ collision,which is an ideal channel for calibrating the beam luminosity of a Photon Linear Collider.We analyze the dependence...We present the NLO electroweak radiative corrections to the e^(+)e^(−)γ production in γγ collision,which is an ideal channel for calibrating the beam luminosity of a Photon Linear Collider.We analyze the dependence of the total cross section on the beam colliding energy,and then investigate the kinematic distributions of final particles at various initial photon beam polarizations at EW NLO accuracy.The numerical results indicate that the EW relative corrections to the total cross section are non-negligible and become increasingly significant as the increase of the beam colliding energy,even can exceed -10% in the J=2 γγ collision at √s=1 TeV.Such EW corrections are very important and should be taken into consideration in precision theoretical and experimental studies at high-energy γγ colliders.展开更多
We thoroughly investigate both transverse momentum and threshold resummation effects on scalar-pseudoscalar pair production via quark-antiquark annihilation at the 13 TeV Large Hadron Collider at QCD NLO+NLL accuracy....We thoroughly investigate both transverse momentum and threshold resummation effects on scalar-pseudoscalar pair production via quark-antiquark annihilation at the 13 TeV Large Hadron Collider at QCD NLO+NLL accuracy.A factorization method is introduced to properly supplement the soft-gluon(threshold)resummation contribution from parton distribution functions to the resummed results obtained by the Collins-Soper-Ster-man resummation approach.We find that the impact of the threshold-resummation improved PDFs is comparable to the resummation effect of the partonic matrix element and can even predominate in high invariant mass regions.Moreover,the loop-induced gluon-gluon fusion channel in the type-I two-Higgs-doublet model is considered in our calculations.The numerical results show that the electroweak production via quark-antiquark annihilation dominates over the gluon-initiated QCD production by 1-2 orders of magnitude.展开更多
基金Supported in part by the National Natural Science Foundation of China(11775211,12061141005)the CAS Center for Excellence in Particle Physics(CCEPP)。
文摘We present the NLO electroweak radiative corrections to the e^(+)e^(−)γ production in γγ collision,which is an ideal channel for calibrating the beam luminosity of a Photon Linear Collider.We analyze the dependence of the total cross section on the beam colliding energy,and then investigate the kinematic distributions of final particles at various initial photon beam polarizations at EW NLO accuracy.The numerical results indicate that the EW relative corrections to the total cross section are non-negligible and become increasingly significant as the increase of the beam colliding energy,even can exceed -10% in the J=2 γγ collision at √s=1 TeV.Such EW corrections are very important and should be taken into consideration in precision theoretical and experimental studies at high-energy γγ colliders.
基金Supported in part by the National Natural Science Foundation of China(11775211,12061141005,11805001,11935001)the CAS Center for Excellence in Particle Physics(CCEPP)。
文摘We thoroughly investigate both transverse momentum and threshold resummation effects on scalar-pseudoscalar pair production via quark-antiquark annihilation at the 13 TeV Large Hadron Collider at QCD NLO+NLL accuracy.A factorization method is introduced to properly supplement the soft-gluon(threshold)resummation contribution from parton distribution functions to the resummed results obtained by the Collins-Soper-Ster-man resummation approach.We find that the impact of the threshold-resummation improved PDFs is comparable to the resummation effect of the partonic matrix element and can even predominate in high invariant mass regions.Moreover,the loop-induced gluon-gluon fusion channel in the type-I two-Higgs-doublet model is considered in our calculations.The numerical results show that the electroweak production via quark-antiquark annihilation dominates over the gluon-initiated QCD production by 1-2 orders of magnitude.
