The first observation of the production of (WW +/-)-W-+/- bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 138 fb(-1) recorded at a center-of-mass energy of 13 TeV using the CMS detector at the CERN LHC. Multivariate discriminants are used to distinguish the signal process from the main backgrounds. A binned maximum likelihood fit is performed to extract the signal cross section. The measured cross section for production of same-sign W bosons decaying leptonically is 80.7 +/- 11.2(stat) (+9.5)(-8.6)(syst) +/- 12.1(model) fb, whereas the measured fiducial cross section is 6.28 +/- 0.81(stat) +/- 0.69(syst) +/- 0.37(model) fb. The observed significance of the signal is 6.2 standard deviations above the background-only hypothesis.

Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s =13 TeV / Tumasyan, A., Adam, W., Andrejkovic, J. w., Bergauer, T., Chatterjee, S., Damanakis, K., Dragicevic, M., Escalante Del Valle, A., Hussain, P. s., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Paulitsch, P., Pitters, F. m., Schieck, J., Schöfbeck, R., Schwarz, D., Templ, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:9(2023), pp. 1-20. [10.1103/physrevlett.131.091803]

Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s =13 TeV

Del Re, D.;Organtini, G.;Paramatti, R.;Quaranta, C.;Rahatlou, S.;Santanastasio, F.;
2023

Abstract

The first observation of the production of (WW +/-)-W-+/- bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 138 fb(-1) recorded at a center-of-mass energy of 13 TeV using the CMS detector at the CERN LHC. Multivariate discriminants are used to distinguish the signal process from the main backgrounds. A binned maximum likelihood fit is performed to extract the signal cross section. The measured cross section for production of same-sign W bosons decaying leptonically is 80.7 +/- 11.2(stat) (+9.5)(-8.6)(syst) +/- 12.1(model) fb, whereas the measured fiducial cross section is 6.28 +/- 0.81(stat) +/- 0.69(syst) +/- 0.37(model) fb. The observed significance of the signal is 6.2 standard deviations above the background-only hypothesis.
2023
CMS; LHC; WW production
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s =13 TeV / Tumasyan, A., Adam, W., Andrejkovic, J. w., Bergauer, T., Chatterjee, S., Damanakis, K., Dragicevic, M., Escalante Del Valle, A., Hussain, P. s., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Paulitsch, P., Pitters, F. m., Schieck, J., Schöfbeck, R., Schwarz, D., Templ, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:9(2023), pp. 1-20. [10.1103/physrevlett.131.091803]
File allegati a questo prodotto
File Dimensione Formato  
Tumasyan_Observation_2023.pdf

accesso aperto

Note: Articolo su rivista
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 979.16 kB
Formato Adobe PDF
979.16 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720275
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 9
social impact