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Title: | Observation of Same-Sign WW Production from Double Parton Scattering in Proton-Proton Collisions at √s=13 TeV |
Authors: | CMS Collaboration Tumasyan, A. ALPANA, K. DUBE, SOURABH KANSAL, B. LAHA, A. PANDEY, S. RASTOGI, A. SHARMA, SEEMA et al. Dept. of Physics |
Keywords: | CMS Top quark 2024-JAN-WEEK2 TOC-JAN-2024 2023 |
Issue Date: | Sep-2023 |
Publisher: | American Physical Society |
Citation: | Physical Review Letter, 131(09), 091803. |
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)( -8.6)(+9.5)(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. |
URI: | https://doi.org/10.1103/PhysRevLett.131.091803 http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8425 |
ISSN: | 1079-7114 0031-9007 |
Appears in Collections: | JOURNAL ARTICLES |
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