Gluon fusion contribution to VHj production at hadron colliders

• Published in: Physics letters. B Vol. 741; pp. 111 - 116
• Main Authors: Agrawal, Pankaj, Shivaji, Ambresh
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 04.02.2015; Elsevier
• Subjects: Amplitudes; Channels; Cross sections; Gages; Gluon fusion; Higgs; Higgs bosons; Invariants; Large Hadron Collider; LHC; Mathematical analysis; Nuclear fusion; One-loop; One-loop; Higgs; LHC; Gluon fusion
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2014.12.021

We study the associated production of an electroweak vector boson and the Higgs boson with a jet via gluon–gluon fusion. At the leading order, these processes occur at one-loop level. The amplitudes of these one-loop processes are gauge invariant and finite. Therefore, their contributions towards the corresponding hadronic cross sections and kinematic distributions can be calculated separately. We present results for the Large Hadron Collider and its discussed upgrades. We find that the gluon–gluon one-loop process gives dominant contribution to the γHj production. We observe a destructive interference effect in the gg→ZHj amplitude. We also find that in the high transverse momentum and central rapidity region, the ZHj production cross section via gluon–gluon fusion becomes comparable to the cross section contributions coming from quark–quark and quark–gluon channels.