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Munir, Shoaib
Publications (5 of 5) Show all publications
Munir, S., Moretti, S., Bomark, N.-E. & Roszkowski, L. (2015). A light NMSSM pseudoscalar Higgs boson at the LHC redux. Journal of High Energy Physics (JHEP), 02(044)
Open this publication in new window or tab >>A light NMSSM pseudoscalar Higgs boson at the LHC redux
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 02, no 044Article in journal (Refereed) Published
Abstract [en]

The Next-to-Minimal Supersymmetric Standard Model (NMSSM) contains a singlet-like pseudoscalar Higgs boson in addition to the doublet-like pseudoscalar of the Minimal Supersymmetric Standard Model. This new pseudoscalar can have a very low mass without violating the LEP exclusion constraints and it can potentially provide a hallmark signature of non-minimal supersymmetry at the LHC. In this analysis we revisit the light pseudoscalar in the NMSSM with partial universality at some high unification scale. We delineate the regions of the model’s parameter space that are consistent with the up-to-date theoretical and experimental constraints, from both Higgs boson searches and elsewhere (most notably b-physics), and examine to what extent they can be probed by the LHC. To this end we review the most important production channels of such a Higgs state and assess the scope of its observation at the forthcoming Run-2 of the LHC. We conclude that the bb-associated production of the pseudoscalar, which has been emphasised in previous studies, does not carry much promise anymore, given the measured mass of the Higgs boson at the LHC. However, the decays of one of the heavier scalar Higgs bosons of the NMSSM can potentially lead to the discovery of its light pseudoscalar. Especially promising are the decays of one or both of the two lightest scalar states into a pseudoscalar pair and of the heaviest scalar into a pseudoscalar and a Z boson. Since the latter channel has not been explored in detail in the literature so far, we provide details of some benchmark points which can be probed for establishing its signature.

Place, publisher, year, edition, pages
Springer, 2015
National Category
Physical Sciences
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
urn:nbn:se:uu:diva-240687 (URN)10.1007/JHEP02(2015)044 (DOI)000349666500004 ()
Funder
Swedish Research Council, 2007-4071Swedish Research Council, 621-2011-5107
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2017-12-05Bibliographically approved
Enberg, R., Klemm, W., Moretti, S., Munir, S. & Wouda, G. (2015). Charged Higgs boson in the W± Higgs channel at the Large Hadron Collider. Nuclear Physics B, 893, 420-442
Open this publication in new window or tab >>Charged Higgs boson in the W± Higgs channel at the Large Hadron Collider
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2015 (English)In: Nuclear Physics B, ISSN 0550-3213, E-ISSN 1873-1562, Vol. 893, p. 420-442Article in journal (Refereed) Published
Abstract [en]

In light of the recent discovery of a neutral Higgs boson, Hobs, with a mass near 125 GeV, we reassess the LHC discovery potential of a charged Higgs boson, H±, in the W±Hobs decay channel. This decay channel can be particularly important for a H± heavier than the top quark, when it is produced through the pp→tH± process. The knowledge of the mass of Hobsprovides an additional handle in the kinematic selection when reconstructing a Breit-Wigner resonance in the Hobs→bb¯ decay channel. We consider some extensions of the Standard Model Higgs sector, with and without supersymmetry, and perform a dedicated signal-to-background analysis to test the scope of this channel for the LHC running at design energy (14 TeV), for 300/fb (standard) and 3000/fb (high) integrated luminosities. We find that, while this channel does not show much promise for a supersymmetric H± state, significant portions of the parameter spaces of several two-Higgs doublet models are testable.

Keywords
Higgs boson, charged Higgs boson, LHC, supersymmetry
National Category
Subatomic Physics
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
urn:nbn:se:uu:diva-240312 (URN)10.1016/j.nuclphysb.2015.02.001 (DOI)000352045000019 ()
Funder
Swedish Research Council, 2007-4071Swedish Research Council, 621-2011-5107
Available from: 2015-01-07 Created: 2015-01-07 Last updated: 2017-12-05Bibliographically approved
Enberg, R., Munir, S., Perez de los Heros, C. & Werder, D. (2015). Prospects for higgsino-singlino dark matter detection at IceCube and PINGU.
Open this publication in new window or tab >>Prospects for higgsino-singlino dark matter detection at IceCube and PINGU
2015 (English)Article in journal (Refereed) Submitted
Abstract [en]

We study neutralino dark matter (DM) with large singlino fractions in the next-to-minimal supersymmetric Standard Model (NMSSM). We perform a detailed analysis of the parameter space regions of the model that yield such DM while satisfying the constraints from the Higgs boson searches at the Large Electron Proton (LEP) collider and the Large Hadron Collider (LHC) as well as from b-physics experiments. We find that this DM can yield a thermal relic density consistent with the Planck measurement in mass regions where the lightest neutralino of the minimal supersymmetric Standard Model (MSSM) generally cannot. This is particularly true for lighter DM masses, either less than 10 GeV or between 60 -100 GeV, and for heavier DM masses, between 500 - 1000 GeV. We then analyse the prospects for indirect detection of such DM at the IceCube neutrino telescope, assuming the complete 86-string configuration including DeepCore. We also consider the added sensitivity to low-mass DM with the proposed PINGU extension. We find that IceCube is sensitive to some regions of the NMSSM parameter space containing singlino-dominated DM and that a subset of such model points are already ruled out by the IceCube one-year data. IceCube will also be sensitive to some parameter space regions that will not be probed by the upcoming ton-scale direct detection experiments.

Keywords
Dark matter, supersymmetry, IceCube experiment, neutrino telescope, singlino, higgsino
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
urn:nbn:se:uu:diva-256039 (URN)
Funder
Swedish Research Council, 2007-4071Swedish Research Council, 621- 2011-5107Swedish Research Council, 621-2011-5109Swedish National Infrastructure for Computing (SNIC), SNIC 2014/1-5Swedish National Infrastructure for Computing (SNIC), p2013257
Available from: 2015-06-22 Created: 2015-06-22 Last updated: 2016-01-13
Munir, S. (2014). Novel Higgs-to-125 GeV Higgs boson decays in the complex NMSSM. Physical Review D, 89(9), 095013
Open this publication in new window or tab >>Novel Higgs-to-125 GeV Higgs boson decays in the complex NMSSM
2014 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 89, no 9, p. 095013-Article in journal (Refereed) Published
Abstract [en]

In the next-to-minimal supersymmetric standard model (NMSSM) a variety of parameter configurations yields a Higgs boson consistent with the one observed at the LHC. Additionally, the Higgs sector of the model can contain explicit charge parity (CP)-violating phases even at the tree level, in contrast with the minimal supersymmetric standard model (MSSM). In this article we present the one-loop Higgs boson mass matrix of the complex NMSSM in the renormalization-group-improved effective potential approach. We also present the trilinear Higgs boson self couplings as well as various partial decay widths of a generic CP-mixed Higgs boson in the model. We then analyze a very interesting phenomenological scenario wherein the decay of a relatively light pseudoscalar-like Higgs boson into similar to 125 GeV standard model-like Higgs boson(s) is induced by nonzero CP-violating phases. We discuss in detail a few benchmark cases in which such a decay can contribute significantly to the production of SM-like Higgs bosons at the LHC on top of the gluon fusion process. It can thus be partially responsible for the gamma gamma excess near 125 GeV due to the subsequent decay of the SM-like Higgs boson. Such a scenario is extremely difficult to realize in the complex MSSM and, if probed at the LHC, it could provide an indication of the nonminimal nature of supersymmetry.

National Category
Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-214487 (URN)10.1103/PhysRevD.89.095013 (DOI)000335829100008 ()
Available from: 2014-01-08 Created: 2014-01-08 Last updated: 2017-12-06Bibliographically approved
Munir, S., Moretti, S., Bomark, N.-E. & Roszkowski, L. (2014). Revisiting a light NMSSM pseudoscalar at the LHC. In: : . Paper presented at Prospects for Charged Higgs Discovery at Colliders (CHARGED 2014), 16-18 September 2014, Uppsala, Sweden.
Open this publication in new window or tab >>Revisiting a light NMSSM pseudoscalar at the LHC
2014 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The discovery of a light, singlet-like pseudoscalar Higgs boson, A1, of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) could provide a hallmark signature of non-minimal supersymmetry. We review here the potential of the LHC to probe such a light A1 in the decays of one of the heavier scalar Higgs bosons of the NMSSM. We find the production of pairs of the A1, with a mass below 60 GeV or so, via decays of the two lightest scalar states to be especially promising, for an integrated luminosity as low as 30/fb. For heavier masses, the decay of the heaviest scalar into a Z boson and an A1 could lead to its detection at the LHC.

National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-240703 (URN)
Conference
Prospects for Charged Higgs Discovery at Colliders (CHARGED 2014), 16-18 September 2014, Uppsala, Sweden
Funder
Swedish Research Council, 2007-4071Swedish Research Council, 621-2011-5107
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2015-01-08
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