Neutral scalar Higgs bosons in the USSM at the LHC

Ham, S. W.; Hur, Taeil; Ko, Pyungwon; Oh, S. K.

doi:10.1088/0954-3899/35/9/095007

Cited by 8 publications

(19 citation statements)

References 66 publications

(70 reference statements)

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“…The exotic quarks and squarks could appear in decays of the Z ′ , or may manifest themselves indirectly, since the production of the heaviest Higgs boson (via gluon fusion) can be dominantly mediated by loops of these exotics [452]. The production of neutral Higgs bosons in this class of models has been discussed in [478].…”

Section: U(1) ′ -Extensions Of the Nmssmmentioning

confidence: 99%

The Next-to-Minimal Supersymmetric Standard Model

2010

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We review the theoretical and phenomenological aspects of the Next-to-Minimal Supersymmetric Standard Model: the Higgs sector including radiative corrections and the 2-loop beta-functions for all parameters of the general NMSSM; the tadpole and domain wall problems, baryogenesis; NMSSM phenomenology at colliders, B physics and dark matter; specific scenarios as the constrained NMSSM, Gauge Mediated Supersymmetry Breaking, U(1)'-extensions, CP and R-parity violation.Comment: 144 pages, 11 figures, corrections in Eqs.(2.2), (2.21), (B.9

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Section: U(1) ′ -Extensions Of the Nmssmmentioning

confidence: 99%

The Next-to-Minimal Supersymmetric Standard Model

2010

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“…[71,95]). There has also been a lot of work recently including investigations of the neutralino sector [96][97][98][99]; the relic density of dark matter [100]; GUT scale family symmetries which can explain the hierarchy of masses in the fermion sector and their associated mixings [101]; neutrino physics [102]; explanations of the matter-antimatter asymmetry of the Universe though EW baryogenesis or leptogenesis [93,94,103]; decays of the Z boson [104][105][106][107]; dipole moments [108]; anomaly mediated SUSY breaking with D-term contributions [109] and the (extended) Higgs sectors [110,111].…”

Section: U (1) Extensions and The E 6 Ssmmentioning

confidence: 99%

Z′mass limits and the naturalness of supersymmetry

2015

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The discovery of a 125 GeV Higgs boson and rising lower bounds on the masses of superpartners have lead to concerns that supersymmetric models are now fine-tuned. Large stop masses, required for a 125 GeV Higgs, feed into the electroweak symmetry breaking conditions through renormalization group equations forcing one to fine-tune these parameters to obtain the correct electroweak vacuum expectation value. Nonetheless, this fine-tuning depends crucially on our assumptions about the supersymmetry breaking scale. At the same time, U (1) extensions provide the most compelling solution to the µ problem, which is also a naturalness issue, and allow the tree-level Higgs mass to be raised substantially above M Z . These very well-motivated supersymmetric models predict a new Z boson which could be discovered at the LHC, and the naturalness of the model requires that the Z boson mass should not be too far above the TeV scale. Moreover, this fine-tuning appears at the tree level, making it less dependent on assumptions about the supersymmetry breaking mechanism. Here we study this fine-tuning for several U (1) supersymmetric extensions of the Standard Model and compare it to the situation in the MSSM where the most direct tree-level fine-tuning can be probed through chargino mass limits. We show that future LHC Z searches are extremely important for challenging the most natural scenarios in these models.

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“…Now, we are ready for carrying out numerical analysis. The scheme for setting the relevant parameters is similar to our previous analysis [18][19][20][21][22]. First of all, we note that there are strong experimental constraints in the USSM on the mass of the extra gauge boson, m Z ′ , and on the size of the mixing angle |φ| between Z and Z ′ .…”

Section: Numerical Analysismentioning

confidence: 83%

“…The presence of these exotic quarks is interesting from the phenomenological point of view. In particular, scenarios with a light exotic quark in the USSM have extensively been investigated [18][19][20][21][22]. A recent study have shown that the exotic quarks may contribute by large amount to the CP mixing between the heaviest scalar and pseudoscalar Higgs bosons [18].…”

Section: Introductionmentioning

confidence: 99%

Exotic quark effects on the Higgs sector of the USSM at the LHC

Ham

2010

J. Phys. G: Nucl. Part. Phys.

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The Higgs sector of the U (1)-extended supersymmetric model is studied with great detail. We calculate the masses of the Higgs bosons at the one-loop level. We also calculate at the one-loop level the gluon-involving processes for the productions and decays of the scalar Higgs bosons of the model at the energy of the CERN Large Hadron Collider (LHC), where the radiative corrections due to the loops of top, bottom, and exotic quarks and their scalar partners are taken into account. We find that the exotic quark and exotic scalar quarks in the model may manifest themselves at the LHC, since the production of the heaviest scalar Higgs boson via gluon fusion processes is mediated virtually by the loops of exotic quark and exotic scalar quarks, for a reasonable parameter set of the model.

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Neutral scalar Higgs bosons in the USSM at the LHC

Cited by 8 publications

References 66 publications

The Next-to-Minimal Supersymmetric Standard Model

The Next-to-Minimal Supersymmetric Standard Model

Z′mass limits and the naturalness of supersymmetry

Exotic quark effects on the Higgs sector of the USSM at the LHC

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