Leptophobic U(1)'s and the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mo>−</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>anomalies

Babu, K. S.; Kolda, Christopher; March-Russell, John

doi:10.1103/physrevd.54.4635

Cited by 270 publications

(370 citation statements)

References 42 publications

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“…This observation is consistent with the region of the parameter space considered here, since for instance, scalar neutrinos heavier than~0 2 and scalar leptons would make it competitive with the others. Table V [19][20][21]. We discuss these plots in terms of their ability to discriminative between the MSSM and Uð1Þ 0 models.…”

Section: B the Lhc Signatures Of The Uð1þmentioning

confidence: 99%

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Search for gauge extensions of the MSSM at the LHC

et al. 2009

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The extensions of the minimal supersymmetric model (MSSM), driving mainly from the need to solve the problem, involve novel matter species and gauge groups. These extended MSSM models can be searched for at the LHC via the effects of the gauge and Higgs bosons or their fermionic partners. Traditionally, the focus has been on the study of the extra forces induced by the new gauge and Higgs bosons present in such models. An alternative way of studying such effects is through the superpartners of matter species and the gauge forces. We thus consider a Uð1Þ 0 gauge extension of the MSSM, and perform an extensive study of the signatures of the model through the production and decays of the scalar quarks and gluino, which are expected to be produced copiously at the LHC. After a detailed study of the distinctive features of such models with regard to the signatures at the LHC, we carry out a detailed Monte Carlo analysis of the signals from the process pp ! n leptons þ m jets þ E 6 T , and compare the resulting distributions with those predicted by the MSSM. Our results show that the searches for the extra gauge interactions in the supersymmetric framework can proceed not only through the forces mediated by the gauge and Higgs bosons but also through the superpartner forces mediated by the gauge and Higgs fermions. Analysis of the events induced by the squark/gluino decays presented here is complementary to the direct Z 0 searches at the LHC.

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Section: B the Lhc Signatures Of The Uð1þmentioning

confidence: 99%

“…where the value of the kinetic mixing angle follows from its radiative nature [3,20]. The ranges of the parameters must be such that the bound j ZÀZ 0 j & 10 À3 [7] is respected.…”

Section: The Lhc Signals Of the Uð1þ 0 Modelmentioning

confidence: 99%

Search for gauge extensions of the MSSM at the LHC

et al. 2009

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“…(77) and (78) also contain mixing terms 5 between the U(1) Y and U(1) X gauge bosons. After transforming to the canonical gauge kinetic terms, this mixing leads to an overall shift in the U(1) X charges as well as the coupled renormalization group equations for two U(1) gauge couplings and the U(1) X charge shift [19]. However, when the extra gauge boson gets a heavy mass for giving the see-saw scale for neutrino masses, the mixing effect is not relevant for the low energy physics while the running of the gauge coupling for a light U(1) gauge boson is not affected by the presence of the mixing term [19].…”

Section: Computation Of Tracesmentioning

confidence: 99%

Gauge coupling unification in six dimensions

Lee

2007

Phys. Rev. D

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We compute the one-loop gauge couplings in six-dimensional non-Abelian gauge theories on the T 2 /Z 2 orbifold with general GUT breaking boundary conditions. For concreteness, we apply the obtained general formulae to the gauge coupling running in a 6D SO(10) orbifold GUT where the GUT group is broken down to the standard model gauge group up to an extra U (1). We find that the one-loop corrections depend on the parity matrices encoding the orbifold boundary conditions as well as the volume and shape moduli of extra dimensions. When the U (1) is broken by the VEV of bulk singlets, the accompanying extra color triplets also affect the unification of the gauge couplings. In this case, the B − L breaking scale is closely linked to the compactification scales for maintaining a success of the gauge coupling unification.

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“…Although it is possible to add extra matter to the theory to bring the gauge couplings back into alignment at the high scale (see e.g. [63,64,53]), we defer a discussion of the effects of extra matter (beyond that needed to fill a 27 of E 6 ) to the next section.…”

Section: η-Model Of Ementioning

confidence: 99%

“…The kinetic terms of U (1) Y can mix with those of U (1) ′ with a strength that is a priori unknown and a free parameter (again, in particular models there are constraints from experiment) [51,52,53,54,55]. Furthermore, the mixing is not RG invariant if…”

Section: Extra U(1) ′mentioning

confidence: 99%

Disrupting the one-loop renormalization group invariant M/α in supersymmetry

Kribs¹

1998

Nuclear Physics B

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It is well known that in low energy supersymmetry the ratio of the gaugino mass to the gauge coupling squared, M/α, is renormalization group invariant to one-loop. We present a systematic analysis of the corrections to this ratio, including standard two-loop corrections from gauge and Yukawa couplings, corrections due to an additional U (1) ′ gaugino, threshold corrections, superoblique corrections, corrections due to extra matter, GUT and Planck scale corrections, and "corrections" from messenger sectors with supersymmetry breaking communicated via gauge-mediation. We show that many of these effects induce corrections at the level of a few to tens of percent, but some could give much larger corrections, drastically disrupting the renormalization group extrapolation of the ratio to higher scales. Our analysis is essentially model-independent, and therefore can be used to determine the ambiguities in extrapolating the ratio in any given model between the weak scale and higher scales.

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Leptophobic U(1)'s and theRb−Rcanomalies

Cited by 270 publications

References 42 publications

Search for gauge extensions of the MSSM at the LHC

Search for gauge extensions of the MSSM at the LHC

Gauge coupling unification in six dimensions

Disrupting the one-loop renormalization group invariant M/α in supersymmetry

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