scholarly journals Search for pair production of first-generation scalar leptoquarks at s=13  TeV

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
E. Asilar ◽  
...  
Keyword(s):  
Pair Production ◽  
First Generation ◽  
Generation Scalar ◽  
Scalar Leptoquarks

scholarly journals Search for Pair Production of First-Generation Scalar Leptoquarks inppCollisions ats=7  TeV

2011 ◽  
Vol 106 (20) ◽  
Author(s):  
V. Khachatryan ◽  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Pair Production ◽  
First Generation ◽  
Generation Scalar ◽  
Scalar Leptoquarks

scholarly journals Search for pair production of third-generation scalar leptoquarks decaying into a top quark and a τ-lepton in pp collisions at $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
◽  
G. Aad ◽  
B. Abbott ◽  
D. C. Abbott ◽  
A. Abed Abud ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Production Cross ◽  
Branching Fraction ◽  
Hadron Collider ◽  
Atlas Detector ◽  
Third Generation ◽  
Final State ◽  
Generation Scalar ◽  
Scalar Leptoquarks

Abstract A search for pair production of third-generation scalar leptoquarks decaying into a top quark and a τ-lepton is presented. The search is based on a dataset of pp collisions at $$ \sqrt{s} $$ s = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1. Events are selected if they have one light lepton (electron or muon) and at least one hadronically decaying τ -lepton, or at least two light leptons. In addition, two or more jets, at least one of which must be identified as containing b-hadrons, are required. Six final states, defined by the multiplicity and flavour of lepton candidates, are considered in the analysis. Each of them is split into multiple event categories to simultaneously search for the signal and constrain several leading backgrounds. The signal-rich event categories require at least one hadronically decaying τ-lepton candidate and exploit the presence of energetic final-state objects, which is characteristic of signal events. No significant excess above the Standard Model expectation is observed in any of the considered event categories, and 95% CL upper limits are set on the production cross section as a function of the leptoquark mass, for different assumptions about the branching fractions into tτ and bν. Scalar leptoquarks decaying exclusively into tτ are excluded up to masses of 1.43 TeV while, for a branching fraction of 50% into tτ, the lower mass limit is 1.22 TeV.

Signals of the first generation scalar leptoquarks at LHeC

2018 ◽  
Vol 33 (06) ◽  
pp. 1850039 ◽  
Author(s):  
Jian Zhang ◽  
Chong-Xing Yue ◽  
Zhi-Cheng Liu
Keyword(s):  
Cross Sections ◽  
First Generation ◽  
Production Cross ◽  
Numerical Results ◽  
Generation Scalar ◽  
Single Production ◽  
Scalar Leptoquarks ◽  
Near Future

We consider single production of the first generation scalar leptoquarks (SLQs) at large hadron electron collider (LHeC) in the context of two simplified SLQ models. Our numerical results show that the production cross-sections are much larger than those at LHC. The possible signals of SLQs might be discovered at LHeC in the near future.

scholarly journals Search for pair production of first- and second-generation scalar leptoquarks inppcollisions ats=7  TeV

2012 ◽  
Vol 86 (5) ◽  
Author(s):  
S. Chatrchyan ◽  
V. Khachatryan ◽  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
...  
Keyword(s):  
Pair Production ◽  
Second Generation ◽  
Generation Scalar ◽  
First And Second Generation ◽  
Scalar Leptoquarks

scholarly journals Search for pair production of second generation scalar leptoquarks

2009 ◽  
Vol 671 (2) ◽  
pp. 224-232 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
M. Abolins ◽  
B.S. Acharya ◽  
M. Adams ◽  
...  
Keyword(s):  
Pair Production ◽  
Second Generation ◽  
Generation Scalar ◽  
Scalar Leptoquarks

scholarly journals Search for first-generation scalar leptoquarks inpp¯collisions ats=1.96  TeV

2005 ◽  
Vol 71 (7) ◽  
Author(s):  
V. M. Abazov ◽  
B. Abbott ◽  
M. Abolins ◽  
B. S. Acharya ◽  
M. Adams ◽  
...  
Keyword(s):  
First Generation ◽  
Generation Scalar ◽  
Scalar Leptoquarks

scholarly journals Search for first generation scalar leptoquarks in pp collisions at s=7 TeV with the ATLAS detector

2012 ◽  
Vol 709 (3) ◽  
pp. 158-176 ◽  
Author(s):  
G. Aad ◽  
B. Abbott ◽  
J. Abdallah ◽  
A.A. Abdelalim ◽  
A. Abdesselam ◽  
...  
Keyword(s):  
First Generation ◽  
Atlas Detector ◽  
Pp Collisions ◽  
Generation Scalar ◽  
Scalar Leptoquarks
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