Imperial College London

Professor Sir Tejinder Singh Virdee FRS

Faculty of Natural SciencesDepartment of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 7590t.virdee Website

 
 
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Location

 

506Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sirunyan:2019:10.1016/j.physletb.2019.01.072,
author = {Sirunyan, AM and Tumasyan, A and Adam, W and Ambrogi, F and Asilar, E and Bergauer, T and Brandstetter, J and Dragicevic, M and Ero, J and Del, Valle AE and Flechl, M and Fruhwirth, R and Ghete, VM and Hrubec, J and Jeitler, M and Krammer, N and Kratschmer, I and Liko, D and Madlener, T and Mikulec, I and Rad, N and Rohringer, H and Schieck, J and Schofbeck, R and Spanring, M and Spitzbart, D and Taurok, A and Waltenberger, W and Wittmann, J and Wulz, C-E and Zarucki, M and Chekhovsky, V and Mossolov, V and Gonzalez, JS and DeWolf, EA and DiCroce, D and Janssen, X and Lauwers, J and Pieters, M and Van, Haevermaet H and Van, Mechelen P and Van, Remortel N and Abu, Zeid S and Blekman, F and D'Hondt, J and De, Bruyn I and De, Clercq J and Deroover, K and Flouris, G and Lontkovskyi, D and Lowette, S and Marchesini, I and Moortgat, S and Moreels, L and Python, Q and Skovpen, K and Tavernier, S and Van, Doninck W and Van, Mulders P and Van, Parijs I and Beghin, D and Bilin, B and Brun, H and},
doi = {10.1016/j.physletb.2019.01.072},
journal = {Physics Letters B},
pages = {345--368},
title = {Search for an Lμ - Lτ gauge boson using Z→4μ events in proton-proton collisions at √s = 13 TeV},
url = {http://dx.doi.org/10.1016/j.physletb.2019.01.072},
volume = {792},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - A search for a narrow Z gauge boson with a mass between 5 and 70 GeV resulting from an Lμ − LτU(1) local gauge symmetry is reported. Theories that predict such a particle have been proposed as anexplanation of various experimental discrepancies, including the lack of a dark matter signal in directdetection experiments, tension in the measurement of the anomalous magnetic moment of the muon,and reports of possible lepton flavor universality violation in B meson decays. A data sample of protonproton collisions at a center-of-mass energy of 13 TeV is used, corresponding to an integrated luminosityof 77.3 fb−1 recorded in 2016 and 2017 by the CMS detector at the LHC. Events containing four muonswith an invariant mass near the standard model Z boson mass are analyzed, and the selection is furtheroptimized to be sensitive to the events that may contain Z → Z μμ → 4μ decays. The event yields areconsistent with the standard model predictions. Upper limits of 10−8–10−7 at 95% confidence level areset on the product of branching fractions B(Z → Z μμ)B(Z → μμ), depending on the Z mass, whichexcludes a Z boson coupling strength to muons above 0.004–0.3. These are the first dedicated limits onLμ − Lτ models at the LHC and result in a significant increase in the excluded model parameter space.The results of this search may also be used to constrain the coupling strength of any light Z gauge bosonto muons
AU - Sirunyan,AM
AU - Tumasyan,A
AU - Adam,W
AU - Ambrogi,F
AU - Asilar,E
AU - Bergauer,T
AU - Brandstetter,J
AU - Dragicevic,M
AU - Ero,J
AU - Del,Valle AE
AU - Flechl,M
AU - Fruhwirth,R
AU - Ghete,VM
AU - Hrubec,J
AU - Jeitler,M
AU - Krammer,N
AU - Kratschmer,I
AU - Liko,D
AU - Madlener,T
AU - Mikulec,I
AU - Rad,N
AU - Rohringer,H
AU - Schieck,J
AU - Schofbeck,R
AU - Spanring,M
AU - Spitzbart,D
AU - Taurok,A
AU - Waltenberger,W
AU - Wittmann,J
AU - Wulz,C-E
AU - Zarucki,M
AU - Chekhovsky,V
AU - Mossolov,V
AU - Gonzalez,JS
AU - DeWolf,EA
AU - DiCroce,D
AU - Janssen,X
AU - Lauwers,J
AU - Pieters,M
AU - Van,Haevermaet H
AU - Van,Mechelen P
AU - Van,Remortel N
AU - Abu,Zeid S
AU - Blekman,F
AU - D'Hondt,J
AU - De,Bruyn I
AU - De,Clercq J
AU - Deroover,K
AU - Flouris,G
AU - Lontkovskyi,D
AU - Lowette,S
AU - Marchesini,I
AU - Moortgat,S
AU - Moreels,L
AU - Python,Q
AU - Skovpen,K
AU - Tavernier,S
AU - Van,Doninck W
AU - Van,Mulders P
AU - Van,Parijs I
AU - Beghin,D
AU - Bilin,B
AU - Brun,H
AU - Clerbaux,B
AU - De,Lentdecker G
AU - Delannoy,H
AU - Dorney,B
AU - Fasanella,G
AU - Favart,L
AU - Goldouzian,R
AU - Grebenyuk,A
AU - Kalsi,AK
AU - Lenzi,T
AU - Luetic,J
AU - Postiau,N
AU - Starling,E
AU - Thomas,L
AU - Vander,Velde C
AU - Vanlaer,P
AU - Vannerom,D
AU - Wang,Q
AU - Cornelis,T
AU - Dobur,D
AU - Fagot,A
AU - Gul,M
AU - Khvastunov,I
AU - Poyraz,D
AU - Roskas,C
AU - Trocino,D
AU - Tytgat,M
AU - Verbeke,W
AU - Vermassen,B
AU - Vit,M
AU - Zaganidis,N
AU - Bakhshiansohi,H
AU - Bondu,O
AU - Brochet,S
AU - Bruno,G
AU - Caputo,C
AU - David,P
AU - Delaere,C
AU - Delcourt,M
AU - Giammanco,A
AU - Krintiras,G
AU - Lemaitre,V
AU - Magitteri,A
AU - Mertens,A
AU - Musich,M
AU - Piotrzkowski,K
AU - Saggio,A
AU - Marono,MV
AU - Wertz,S
AU - Zobec,J
AU - Alves,FL
AU - Alves,GA
AU - Correa,Martins Junior M
AU - Silva,GC
AU - Hensel,C
AU - Moraes,A
AU - Pol,ME
AU - Rebello,Teles P
AU - De,Jesus Damiao D
AU - De,Oliveira Martins C
AU - Fonseca,De Souza S
AU - Malbouisson,H
AU - Matos,Figueiredo D
AU - Melo,De Almeida M
AU - Mora,Herrera C
AU - Mundim,L
AU - Nogima,H
AU - Prado,Da 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 - Ahuja,S
AU - Bernardes,CA
AU - Calligaris,L
AU - Fernandez,Perez Tomei TR
AU - Gregores,EM
AU - Mercadante,PG
AU - Novaes,SF
AU - Padula,SS
AU - Aleksandrov,A
AU - Hadjiiska,R
AU - Iaydjiev,P
AU - Marinov,A
AU - Misheva,M
AU - Rodozov,M
AU - Shopova,M
AU - Sultanov,G
AU - Dimitrov,A
AU - Litov,L
AU - Pavlov,B
AU - Petkov,P
AU - Fang,W
AU - Gao,X
AU - Yuan,L
AU - Ahmad,M
AU - Bian,JG
AU - Chen,GM
DO - 10.1016/j.physletb.2019.01.072
EP - 368
PY - 2019///
SN - 0370-2693
SP - 345
TI - Search for an Lμ - Lτ gauge boson using Z→4μ events in proton-proton collisions at √s = 13 TeV
T2 - Physics Letters B
UR - http://dx.doi.org/10.1016/j.physletb.2019.01.072
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000466802100054&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/70897
VL - 792
ER -