Measurement of the production cross section of a Higgs boson with large transverse momentum in its decays to a pair of τ leptons in proton-proton collisions at s=13TeV

CMS Higgs boson Tau leptonA measurement of the production cross section of a Higgs boson with transverse momentum greater than 250 GeV is presented where the Higgs boson decays to a pair of τ leptons.It is based on proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV.The data sample corresponds to an integrated luminosity of 138 fb -1 .Because of the large transverse momentum of the Higgs boson the τ leptons from its decays are boosted and produced spatially close, with their decay products overlapping.Therefore, a dedicated algorithm was developed to reconstruct and identify them.The observed (expected) significance of the measured signal with respect to the standard model background-only hypothesis is 3.5 (2.2) standard deviations.The product of the production cross section and branching fraction is measured to be 1.64 +0.68 -0.54 times the standard model expectation.The fiducial differential production cross section is also measured as functions of the Higgs boson and leading jet transverse momenta.This measurement extends the probed large-transverse-momentum region in the ττ final state beyond 600 GeV.⋆ E-mail address: cms -publication -committee -