In this study, we investigate the process $pp \rightarrow W^{ \pm} \gamma$ for the physics potential of the FCC-hh with $\sqrt{ s}=100$ TeV to examine the anomalous $WW\gamma$ couplings defined by three CP-conserving and two CP-violating effective operators of dimension-6. The analysis containing the realistic detector effects is carried out in the mode where $W^{ \pm}$ bosons in the final state decay into the leptonic channel. The best sensitivities obtained from the process $pp \rightarrow W^{ \pm} \gamma$ on the anomalous couplings $C_{ WWW}/ \Lambda^{ 2}$ and $C_{ W,B}/ \Lambda^{ 2}$ determined by CP-conserving effective Lagrangians are $[-0.01; 0.01]$ TeV$^{ -2}$ and $[-0.88; 0.88]$ TeV$^{ -2}$, while $C_{ \tilde{ W}WW}/ \Lambda^{ 2}$ and $C_{ \tilde{ W}}/ \Lambda^{ 2}$ couplings defined by CP-violating effective Lagrangian are obtained as $[-0.03; 0.03]$ TeV$^{ -2}$ and $[-0.47; 0.47]$ TeV$^{ -2}$ at the FCC-hh with $\sqrt{ s}=100$ TeV, $L_{ int}=30$ ab$^{ -1}$. However, if the systematic uncertainty is included, we obtain reduced sensitivities on the anomalous $WW\gamma$ coupling . The results are compared for assumed systematics of $5\%$ and $10\%$.
Categories: hep-ph