A new precision process at FCC-hh: the diphoton leptonic Wh channel

Abstract

Abstract The increase in luminosity and center of mass energy at the FCC-hh will open up new clean channels where BSM contributions are enhanced at high energy. In this paper we study one such channel, Wh → ℓνγγ. We estimate the sensitivity to the O φq 3 $$ {\mathcal{O}}_{\varphi q}^{(3)} $$ , O φ W $$ {\mathcal{O}}_{\varphi \mathrm{W}} $$ , and O φ W ˜ $$ {\mathcal{O}}_{\varphi \tilde{\mathrm{W}}} $$ SMEFT operators. We find that this channel will be competitive with fully leptonic WZ production in setting bounds on O φq 3 $$ {\mathcal{O}}_{\varphi q}^{(3)} $$ . We also find that the double differential distribution in the p T h $$ {p}_T^h $$ and the leptonic azimuthal angle can be exploited to enhance the sensitivity to O φ W ˜ $$ {\mathcal{O}}_{\varphi \tilde{\mathrm{W}}} $$ . However, the bounds on O φ W $$ {\mathcal{O}}_{\varphi \mathrm{W}} $$ and O φ W ˜ $$ {\mathcal{O}}_{\varphi \tilde{\mathrm{W}}} $$ we obtain in our analysis, though complementary and more direct, are not competitive with those coming from other measurements such as EDMs and inclusive Higgs measurements.

Keywords

• Beyond Standard Model
• Electroweak interaction
• Higgs physics
• Hadron- Hadron scattering (experiments)
• Photon production