Imperial College London
Alternate

Professor Sir Tejinder Singh Virdee FRS

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

t.virdee Website

 
 
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Location

 

506Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sirunyan:2020:10.1007/JHEP03(2020)051,
author = {Sirunyan, AM and Tumasyan, A and Adam, W and Ambrogi, F and Bergauer, T and Dragicevic, M and Eroe, J and Del, Valle AE and Flechl, M and Fruehwirth, R and Jeitler, M and Krammer, N and Kraetschmer, I and Liko, D and Madlener, T and Mikulec, I and Rad, N and Schieck, J and Schoefbeck, R and Spanring, M and Spitzbart, D and Waltenberger, W and Wulz, C-E and Zarucki, M and Drugakov, V and Mossolov, V and Gonzalez, JS and Darwish, MR and De, Wolf EA and Di, Croce D and Janssen, X and Lelek, A and Pieters, M and Sfar, HR and Van, Haevermaet H and Van, Mechelen P and Van, Putte S and Van, Remortel N and Blekman, F and Bols, ES and Chhibra, SS and D'Hondt, J and De, Clercq J and Lontkovskyi, D and Lowette, S and Marchesini, I and Moortgat, S and Python, Q and Skovpen, K and Tavernier, S and Van, Doninck W and Van, Mulders P and Beghin, D and Bilin, B and Clerbaux, B and De, Lentdecker G and Delannoy, H and Dorney, B and Favart, L and Grebenyuk, A and Kalsi, AK and Popov, A and Postiau, N and},
doi = {10.1007/JHEP03(2020)051},
journal = {The Journal of High Energy Physics},
pages = {1--50},
title = {Search for physics beyond the standard model in multilepton final states in proton-proton collisions at root s=13 TeV},
url = {http://dx.doi.org/10.1007/JHEP03(2020)051},
volume = {2020},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A search for physics beyond the standard model in events with at least three charged leptons (electrons or muons) is presented. The data sample corresponds to an integrated luminosity of 137 fb−1 of proton-proton collisions at s√ = 13 TeV, collected with the CMS detector at the LHC in 2016–2018. The two targeted signal processes are pair production of type-III seesaw heavy fermions and production of a light scalar or pseudoscalar boson in association with a pair of top quarks. The heavy fermions may be manifested as an excess of events with large values of leptonic transverse momenta or missing transverse momentum. The light scalars or pseudoscalars may create a localized excess in the dilepton mass spectra. The results exclude heavy fermions of the type-III seesaw model for masses below 880 GeV at 95% confidence level in the scenario of equal branching fractions to each lepton flavor. This is the most restrictive limit on the flavor-democratic scenario of the type-III seesaw model to date. Assuming a Yukawa coupling of unit strength to top quarks, branching fractions of new scalar (pseudoscalar) bosons to dielectrons or dimuons above 0.004 (0.03) and 0.04 (0.03) are excluded at 95% confidence level for masses in the range 15–75 and 108–340 GeV, respectively. These are the first limits in these channels on an extension of the standard model with scalar or pseudoscalar particles.
AU  - Sirunyan,AM
AU  - Tumasyan,A
AU  - Adam,W
AU  - Ambrogi,F
AU  - Bergauer,T
AU  - Dragicevic,M
AU  - Eroe,J
AU  - Del,Valle AE
AU  - Flechl,M
AU  - Fruehwirth,R
AU  - Jeitler,M
AU  - Krammer,N
AU  - Kraetschmer,I
AU  - Liko,D
AU  - Madlener,T
AU  - Mikulec,I
AU  - Rad,N
AU  - Schieck,J
AU  - Schoefbeck,R
AU  - Spanring,M
AU  - Spitzbart,D
AU  - Waltenberger,W
AU  - Wulz,C-E
AU  - Zarucki,M
AU  - Drugakov,V
AU  - Mossolov,V
AU  - Gonzalez,JS
AU  - Darwish,MR
AU  - De,Wolf EA
AU  - Di,Croce D
AU  - Janssen,X
AU  - Lelek,A
AU  - Pieters,M
AU  - Sfar,HR
AU  - Van,Haevermaet H
AU  - Van,Mechelen P
AU  - Van,Putte S
AU  - Van,Remortel N
AU  - Blekman,F
AU  - Bols,ES
AU  - Chhibra,SS
AU  - D'Hondt,J
AU  - De,Clercq J
AU  - Lontkovskyi,D
AU  - Lowette,S
AU  - Marchesini,I
AU  - Moortgat,S
AU  - Python,Q
AU  - Skovpen,K
AU  - Tavernier,S
AU  - Van,Doninck W
AU  - Van,Mulders P
AU  - Beghin,D
AU  - Bilin,B
AU  - Clerbaux,B
AU  - De,Lentdecker G
AU  - Delannoy,H
AU  - Dorney,B
AU  - Favart,L
AU  - Grebenyuk,A
AU  - Kalsi,AK
AU  - Popov,A
AU  - Postiau,N
AU  - Starling,E
AU  - Thomas,L
AU  - Vander,Velde C
AU  - Vanlaer,P
AU  - Vannerom,D
AU  - Jaime,MM
AU  - Cornelis,T
AU  - Dobur,D
AU  - Khvastunov,I
AU  - Niedziela,M
AU  - Roskas,C
AU  - Tytgat,M
AU  - Verbeke,W
AU  - Vermassen,B
AU  - Vit,M
AU  - Bondu,O
AU  - Bruno,G
AU  - Caputo,C
AU  - David,P
AU  - Delaere,C
AU  - Delcourt,M
AU  - Giammanco,A
AU  - Lemaitre,V
AU  - Prisciandaro,J
AU  - Saggio,A
AU  - Marono,MV
AU  - Vischia,P
AU  - Zobec,J
AU  - Alves,FL
AU  - Alves,GA
AU  - Correia,Silva G
AU  - Hensel,C
AU  - Moraes,A
AU  - Rebello,Teles P
AU  - Belchior,Batista Das Chagas E
AU  - Carvalho,W
AU  - Chinellato,J
AU  - Coelho,E
AU  - Da,Costa EM
AU  - Da,Silveira GG
AU  - De,Jesus Damiao D
AU  - De,Oliveira Martins C
AU  - Fonseca,De Souza S
AU  - Huertas,Guativa LM
AU  - Malbouisson,H
AU  - Martins,J
AU  - Matos,Figueiredo D
AU  - Melo,De Almeida M
AU  - Mora,Herrera C
AU  - Mundim,L
AU  - Nogima,H
AU  - Prado,Silva WL
AU  - Sanchez,Rosas LJ
AU  - Santoro,A
AU  - Sznajder,A
AU  - Thiel,M
AU  - Tonelli,Manganote EJ
AU  - Torres,Da Silva De Araujo F
AU  - Vilela,Pereira A
AU  - Bernardes,CA
AU  - Calligaris,L
AU  - Tomei,TRFP
AU  - Novaes,SF
AU  - Padula,S
AU  - Gregores,EM
AU  - Mercadante,PG
AU  - Aleksandrov,A
AU  - Antchev,G
AU  - Hadjiiska,R
AU  - Iaydjiev,P
AU  - Misheva,M
AU  - Rodozov,M
AU  - Shopova,M
AU  - Sultanov,G
AU  - Bonchev,M
AU  - Dimitrov,A
AU  - Ivanov,T
AU  - Litov,L
AU  - Pavlov,B
AU  - Petkov,P
AU  - Fang,W
AU  - Gao,X
AU  - Yuan,L
AU  - Chen,GM
AU  - Chen,HS
AU  - Chen,M
AU  - Jiang,CH
AU  - Leggat,D
AU  - Liao,H
AU  - Liu,Z
AU  - Spiezia,A
AU  - Tao,J
AU  - Yazgan,E
AU  - Zhang,H
AU  - Zhang,S
AU  - Zhao,J
AU  - Agapitos,A
AU  - Ban,Y
AU  - Chen,G
AU  - Levin,A
AU  - Li,J
AU  - Li,L
AU  - Li,Q
AU  - Mao,Y
AU  - Qian
DO  - 10.1007/JHEP03(2020)051
EP  - 50
PY  - 2020///
SN  - 1029-8479
SP  - 1
TI  - Search for physics beyond the standard model in multilepton final states in proton-proton collisions at root s=13 TeV
T2  - The Journal of High Energy Physics
UR  - http://dx.doi.org/10.1007/JHEP03(2020)051
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000519956400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007%2FJHEP03%282020%29051
UR  - http://hdl.handle.net/10044/1/77779
VL  - 2020
ER  -
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