Probing anomalous couplings using di-Higgs production in electron–proton collisions
Mukesh Kumar (National Institute for Theoretical Physics, School of Physics, Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Wits 2050, Johannesburg, South Africa); Xifeng Ruan (University of the Witwatersrand, School of Physics, Private Bag 3, Wits 2050, South Africa); Rashidul Islam (Department of Physics, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata, 700009, India); Alan S. Cornell (National Institute for Theoretical Physics, School of Physics, Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Wits 2050, Johannesburg, South Africa); Max Klein (Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom); et al - Show all 7 authors
A proposed high energy Future Circular Hadron-Electron Collider would provide sufficient energy in a clean environment to probe di-Higgs production. Using this channel we show that the azimuthal angle correlation between the missing transverse energy and the forward jet is a very good probe for the non-standard hhh and hhWW couplings. We give the exclusion limits on these couplings as a function of integrated luminosity at a 95% C.L. using the fiducial cross sections. With appropriate error fitting methodology we find that the Higgs boson self coupling could be measured to be ghhh(1)=1.00â0.17(0.12)+0.24(0.14) of its expected Standard Model value at s=3.5(5.0)Â TeV for an ultimate 10Â abâ1 of integrated luminosity.
