scholarly journals Erratum 2: Search for dark matter and unparticles in events with a Z boson and missing transverse momentum in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

2018 ◽  
Vol 2018 (1) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
E. Asilar ◽  
...  
Keyword(s):  
Dark Matter ◽  
Transverse Momentum ◽  
Z Boson ◽  
Proton Proton ◽  
Proton Collisions ◽  
Missing Transverse Momentum ◽  
Proton Proton Collisions

scholarly journals Search for dark matter and unparticles in events with a Z boson and missing transverse momentum in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

2017 ◽  
Vol 2017 (3) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
E. Asilar ◽  
...  
Keyword(s):  
Dark Matter ◽  
Transverse Momentum ◽  
Effective Field Theories ◽  
Z Boson ◽  
Effective Field ◽  
Field Theories ◽  
Proton Proton ◽  
Proton Collisions ◽  
Missing Transverse Momentum ◽  
Proton Proton Collisions

Abstract A search for dark matter and unparticle production at the LHC has been performed using events containing two charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector in 2015, corresponding to an integrated luminosity of 2.3 fb−1 of proton-proton collisions at the LHC, at a center-of-mass energy of 13 TeV. No excess over the standard model expectation is observed. Compared to previous searches in this topology, which exclusively relied on effective field theories, the results are interpreted in terms of a simplified model of dark matter production for both vector and axial vector couplings between a mediator and dark matter particles. The first study of this class of models using CMS data at $$ \sqrt{s}=13 $$ s = 13 TeV is presented. Additionally, effective field theories of dark matter and unparticle production are used to interpret the data.

scholarly journals Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
◽  
A. Tumasyan ◽  
W. Adam ◽  
J. W. Andrejkovic ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Dark Matter ◽  
Transverse Momentum ◽  
Hadronic Decay ◽  
Large Radius ◽  
Proton Proton ◽  
Proton Collisions ◽  
Missing Transverse Momentum ◽  
State Radiation ◽  
Proton Proton Collisions ◽  
New Particles

Abstract A search is presented for new particles produced at the LHC in proton-proton collisions at $$ \sqrt{s} $$ s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb−1, collected in 2017–2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb−1, collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.

scholarly journals Search for dark matter in events with a leptoquark and missing transverse momentum in proton-proton collisions at 13 TeV

2019 ◽  
Vol 795 ◽  
pp. 76-99
Author(s):  
A.M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
E. Asilar ◽  
...  
Keyword(s):  
Dark Matter ◽  
Transverse Momentum ◽  
Proton Proton ◽  
Proton Collisions ◽  
Missing Transverse Momentum ◽  
Proton Proton Collisions
Sign in / Sign up

Export Citation Format

Share Document