The first measurement of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons is presented. The measurement is based on data collected in proton-proton collisions at √s = 13 TeV by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb(-1). The analysis uses the angular correlation between the decay planes of tau leptons produced in Higgs boson decays. The effective mixing angle between CP-even and CP-odd tau Yukawa couplings is found to be -1 +/- 19 degrees, compared to an expected value of 0 +/- 21 degrees at the 68.3% confidence level. The data disfavour the pure CP-odd scenario at 3.0 standard deviations. The results are compatible with predictions for the standard model Higgs boson.
Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons in proton-proton collisions at √s = 13 TeV
A. Cappati;P. Meridiani;N. Amapane;S. Argiro;R. Bellan;A. Bellora;M. Costa;R. Covarelli;B. Kiani;E. Migliore;E. Monteil;M. M. Obertino;L. Pacher;G. L. Pinna Angioni;K. Shchelina;F. Siviero;V. Sola;A. Solano;D. Soldi;M. Tornago;A. Vagnerini;P. Rumerio;R. Salvatico;
2022-01-01
Abstract
The first measurement of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons is presented. The measurement is based on data collected in proton-proton collisions at √s = 13 TeV by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb(-1). The analysis uses the angular correlation between the decay planes of tau leptons produced in Higgs boson decays. The effective mixing angle between CP-even and CP-odd tau Yukawa couplings is found to be -1 +/- 19 degrees, compared to an expected value of 0 +/- 21 degrees at the 68.3% confidence level. The data disfavour the pure CP-odd scenario at 3.0 standard deviations. The results are compatible with predictions for the standard model Higgs boson.File | Dimensione | Formato | |
---|---|---|---|
JHEP06(2022)012.pdf
Accesso aperto
Tipo di file:
PDF EDITORIALE
Dimensione
3.45 MB
Formato
Adobe PDF
|
3.45 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.