The University of Southampton
University of Southampton Institutional Repository

Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at √s =13TeV

Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at √s =13TeV
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 luminosity of 35.9. 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 ( and ) 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 ( ), when the lightest neutralino and the top squark have similar masses. At 95% confidence level, wino-like 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 pair production, top squark masses up to 450 GeV are excluded for a mass difference of 40 GeV relative to the lightest neutralino.
0370-2693
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , The CMS Collaboration (2018) Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at √s =13TeV. Physics Letters B. (doi:10.1016/j.physletb.2018.05.062).

Record type: Article

Abstract

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. 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 ( and ) 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 ( ), when the lightest neutralino and the top squark have similar masses. At 95% confidence level, wino-like 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 pair production, top squark masses up to 450 GeV are excluded for a mass difference of 40 GeV relative to the lightest neutralino.

Text
New physics - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)

More information

Accepted/In Press date: 15 May 2018
e-pub ahead of print date: 25 May 2018

Identifiers

Local EPrints ID: 421709
URI: https://eprints.soton.ac.uk/id/eprint/421709
ISSN: 0370-2693
PURE UUID: e8b552b1-e6cb-4407-a4d6-954b853aecb5
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 22 Jun 2018 16:30
Last modified: 15 Mar 2019 01:33

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×