Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at s=13TeV
A search is presented for new physics in events with two low-momentum, oppositely charged leptons (electrons or muons) and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data collected using the CMS detector at the LHC correspond to an integrated...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier BV
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/65913/1/65913_Search%20for%20new%20physics%20in%20events%20_article.pdf http://irep.iium.edu.my/65913/2/65913_Search%20for%20new%20physics%20in%20events%20_scopus.pdf http://irep.iium.edu.my/65913/ |
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| Summary: | A search is presented for new physics in events with two low-momentum, oppositely charged leptons
(electrons or muons) and missing transverse momentum in proton-proton collisions at a centre-of-mass
energy of 13 TeV. The data collected using the CMS detector at the LHC correspond to an integrated
luminosity of 35.9 fb−1. The observed event yields are consistent with the expectations from the standard
model. The results are interpreted in terms of pair production of charginos and neutralinos (χ±
1 and χ0
2 )
with nearly degenerate masses, as expected in natural supersymmetry models with light higgsinos, as
well as in terms of the pair production of top squarks (
t), when the lightest neutralino and the top squark
have similar masses. At 95% confidence level, wino-like χ±
1 /χ0
2 masses are excluded up to 230 GeV for
a mass difference of 20 GeV relative to the lightest neutralino. In the higgsino-like model, masses are
excluded up to 168 GeV for the same mass difference. For t pair production, top squark masses up to
450 GeV are excluded for a mass difference of 40 GeV relative to the lightest neutralino |
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