University of Cambridge > Talks.cam > HEP phenomenology joint Cavendish-DAMTP seminar > Diboson precision measurements with the Higgs at LHC and FCC-hh

Diboson precision measurements with the Higgs at LHC and FCC-hh

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The possibility of precision measurements at hadron colliders has attracted much interest over the last few years. Among other processes, diboson production stands out as a way to probe EW and Higgs dynamics and indirectly constrain New Physics. This kind of process is already studied at LHC , despite being handicapped by the need for decay channels with high uncertainties. The higher luminosity and centre-of-mass energy of the future FCC -hh collider would allow us to probe these processes with rarer but cleaner final states that are inaccessible at the LHC . The Wh and Zh production processes constitute an excellent example of this, since they can already be studied at LHC when the Higgs boson decays to bottom-anti-bottom pairs, while FCC -hh would allow us to study them also when the Higgs decays to photons. I will first focus on the diphoton leptonic decay channels of the Wh and Zh production processes and discuss our study of these channels at the FCC -hh in the SMEFT framework. I will show how doubly differential distributions can be used to gain even better sensitivity to certain higher-dimensional EFT operators. I will also compare our projections with those for future lepton colliders to emphasize their complementarity. Then, I’ll show our results using the bottom-pair decay channel of the Higgs boson at LHC , HL-LHC and FCC -hh, discuss the limitations of this channel at HL-LHC, and how both Higgs decay channels compare at FCC -hh.

Based on arXiv:2004.06122, arXiv:2011.13941, and 2208.11134

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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