Searching for the Higgsino-Bino sector at the LHC
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Received: June 23, 2020 Accepted: August 13, 2020 Published: September 9, 2020
Searching for the Higgsino-Bino sector at the LHC
a
Physics Department and Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, U.S.A. b Physics Department, Indiana University, Bloomington, IN 47405, U.S.A. c High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A. d Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, U.S.A.
E-mail: [email protected], [email protected], [email protected], [email protected] Abstract: We study the search for electroweakinos at the 13 TeV LHC in the case of heavy scalar superpartners. We consider both the direct production mode and the one associated with the decay of heavy Higgs bosons, and concentrate on the case of light Higgsinos and Binos. In this case, the direct production searches becomes more challenging than in the light Wino scenario. In the direct production mode, we use the current experimental searches to set the reach for these particles at larger luminosities, and we emphasize the relevance of considering both the neutral gauge boson and the neutral Higgs decay modes of the second and third lightest neutralino. We show the complementarity of these searches with the ones induced by the decay of the heavy Higgs bosons, which are dominated by the associated production of the lightest neutralino with the second and third lightest ones, with the latter decaying into gauge bosons. We show that, depending on the value of tan β, the Higgs boson decay channel remains competitive with the direct production channel up to heavy Higgs boson masses of about 1 TeV. Moreover, this search is not limited by the same kinematic considerations as the ones in the direct production mode and can cover masses up to the kinematic threshold for the decay of the heavier electroweakinos into the lightest neutralino. This decay mode provides also an alternative way of looking for heavy Higgs bosons in this range of masses and hence should be a high priority for future LHC analyses. Keywords: Beyond Standard Model, Supersymmetric Standard Model ArXiv ePrint: 2006.07389
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP09(2020)073
JHEP09(2020)073
Jia Liu,a Navin McGinnis,b,c Carlos E.M. Wagnera,c,d and Xiao-Ping Wangc
Contents 1 Introduction
1
2 Electroweakino productions 2.1 Direct electroweakino production 2.2 Electroweakinos from heavy Higgs production
3 3 7
4 Reach of the Higgs decay production mode at higher luminosities
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5 Conclusions
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A Auxiliary figures
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B Results for sgn(µ) = +1
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1
Introduction
The Standard Model provides an excellent low energy effective theory describing the interaction of particles at energies similar to or smaller than the weak scale. Searches at the LHC are underway looking for the possible production of new particles with masses up to a few TeV. No clear signal of new physics has been found, leading to strong bounds on the presence of strongly i
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