Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e+e- collider, such a leptophilic scalar (φL) would be produced predominantly through radiation from a τ lepton. We report herein a search for e+e-→τ+τ-φL, φL→ℓ+ℓ- (ℓ=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the φL coupling to leptons in the range 0.04<7.0 GeV. These bounds significantly improve upon the current constraints, excl...
International audienceMany scenarios of physics beyond the standard model predict the existence of n...
A dark leptophilic scalar $(\phi_L)$ is a hypothetical particle from the dark sector that couples on...
We report the result of a search for scalar leptons in e(+)e(-) collisions at 189 GeV centre-of-mass...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
International audienceMany scenarios of physics beyond the standard model predict the existence of n...
A dark leptophilic scalar $(\phi_L)$ is a hypothetical particle from the dark sector that couples on...
We report the result of a search for scalar leptons in e(+)e(-) collisions at 189 GeV centre-of-mass...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, whi...
International audienceMany scenarios of physics beyond the standard model predict the existence of n...
A dark leptophilic scalar $(\phi_L)$ is a hypothetical particle from the dark sector that couples on...
We report the result of a search for scalar leptons in e(+)e(-) collisions at 189 GeV centre-of-mass...