Search for a very light CP odd neutral Higgs boson of the MSSM

ALEPH Collaboration (1992) Search for a very light CP odd neutral Higgs boson of the MSSM. Physics Letters B, 285 (3). pp. 309-318. ISSN 0370-2693

Abstract

The reactions have been used to search for the neutral Higgs bosons h and A of the MSSM in the case where the CP-odd A is lighter than 2mμ, taking into account the large h → AA decay branching ratio. No signal was found in the data sample collected until the end of 1991 by the ALEPH experiment at LEP. For tan β ⩾, mA < 2mμ is excluded at 95% CL for any mh.