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Ahmed, M.; Amann, J. F.; Barlow, D.; Black, K. M.; Bolton, R. D.; Brooks, M. L.; Carius, Staffan; Chen, Y. K.; Chernyshev, A. K.; Concannon, H. M.; Cooper, M. D.; Cooper, P. S.; Crocker, James H.; Dittmann, J.; Džemidžić, Mario; Empl, A.; Fisk, R. J.; Fleet, E.; Foreman, W.; Gagliardi, C. A.; Haim, D.; Hallin, A. L.; Hoffman, C. M.; Hogan, G. E.; Hughes, E. B.; Hungerford, E.; Jui, C.; Kim, G. J.; Knott, J. E.; Koetke, D. D.; Kozłowski, T.; Kroupa, Martin; Kunselman, A. R.; Lan, Keng Hsueh; Laptev, V.D.; Lee, D.; Liu, F.; Manweiler, R.; Marshall, R.; Mayes, B.; Mischke, R. E.; Nefkens, B. M. K.; Nickerson, L. M.; Nord, P. M.; Oothoudt, M. A.; Otis, J. N.; Phelps, R. A.; Piilonen, L. E.; Pillai, C.; Pinsky, L.; Ritter, M.; Smith, C.; Stanislaus, T. D. S.; Stantz, Keith M.; Szymański, J.; Tang, Lu; Tippens, W. B.; Tribble, R. E.; Tu, X. L.; Ausdeln, L. A. Van; Witch, W. H. Von; Whitehouse, D.; Wilkinson, C. A.; Wright, Bill S.; Wright, S. C.; Zhang, Y.; Ziock, K.O.H.

doi:10.1103/physrevd.65.112002

Cited by 86 publications

(36 citation statements)

References 26 publications

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“…Given the loop suppression with respect to eq. (4.7), one gets values safely below the current experimental limits [51] for the above choice Y ν ∼ 300 TeV. A final comment is in order.…”

Section: Jhep04(2011)093mentioning

confidence: 77%

Gauged flavor group with left-right symmetry

Guadagnoli

Mohapatra

Sung

2011

J. High Energ. Phys.

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Abstract:We construct an anomaly-free extension of the left-right symmetric model, where the maximal flavor group is gauged and anomaly cancellation is guaranteed by adding new vectorlike fermion states. We address the question of the lowest allowed flavor symmetry scale consistent with data. Because of the mechanism recently pointed out by Grinstein et al. tree-level flavor changing neutral currents turn out to play a very weak constraining role. The same occurs, in our model, for electroweak precision observables. The main constraint turns out to come from W R -mediated flavor changing neutral current box diagrams, primarily K − K mixing. In the case where discrete parity symmetry is present at the TeV scale, this constraint implies lower bounds on the mass of vectorlike fermions and flavor bosons of 5 and 10 TeV respectively. However, these limits are weakened under the condition that only SU(2) R ×U(1) B−L is restored at the TeV scale, but not parity. For example, assuming the SU(2) gauge couplings in the ratio g R /g L ≈ 0.7 allows the above limits to go down by half for both vectorlike fermions and flavor bosons. Our model provides a framework for accommodating neutrino masses and, in the parity symmetric case, provides a solution to the strong CP problem. The bound on the lepton flavor gauging scale is somewhat stronger, because of Big Bang Nucleosynthesis constraints. We argue, however, that the applicability of these constraints depends on the mechanism at work for the generation of neutrino masses.

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“…Given the loop suppression with respect to eq. (4.7), one gets values safely below the current experimental limits [51] for the above choice Y ν ∼ 300 TeV. A final comment is in order.…”

Section: Jhep04(2011)093mentioning

confidence: 77%

Gauged flavor group with left-right symmetry

Guadagnoli

Mohapatra

Sung

2011

J. High Energ. Phys.

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“…Using the MEGA bound of BR(µ → eγ) < 1.2 × 10 −11 [41] and the Belle/BABAR bounds of BR(τ → µγ) < 4.5 × 10 −8 [42,43], gives bounds of λ 13 λ 23 < 2.0 × 10 −4 and λ 23 λ 33 < 2.9 × 10 −2 , respectively. These are just a factor of ten or so above my estimates of 3 × 10 −5 and 2 × 10 −3 , respectively.…”

Section: Jhep02(2010)045mentioning

confidence: 99%

Composite leptoquarks at the LHC

Gripaios

2010

J. High Energ. Phys.

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If electroweak symmetry breaking arises via strongly-coupled physics, the observed suppression of flavour-changing processes suggests that fermion masses should arise via mixing of elementary fermions with composite fermions of the strong sector. The strong sector then carries colour charge, and may contain composite leptoquark states, arising either as TeV scale resonances, or even as light, pseudo-Nambu-Goldstone bosons. The latter, since they are coupled to colour, get a mass of the order of several hundred GeV, beyond the reach of current searches at the Tevatron. The same generic mechanism that suppresses flavour-changing processes suppresses leptoquark-mediated rare processes, making it conceivable that the many stringent constraints may be evaded. The leptoquarks couple predominantly to third-generation quarks and leptons, and the prospects for discovery at LHC appear to be good. As an illustration, a model based on the Pati-Salam symmetry is described, and its embedding in models with a larger symmetry incorporating unification of gauge couplings, which provide additional motivation for leptoquark states at or below the TeV scale, is discussed.

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“…e processes is particularly restrictive, given the impressive bounds on ! e from MEGA [1] and MEG [2], on ! e conversion from SINDRUM II [3], and to a lesser extent from !…”

Section: Introductionmentioning

confidence: 99%

μtoeinR-symmetric supersymmetry

Fok

Kribs

2010

Phys. Rev. D

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We compute the one-loop corrections to the Z → b ¯ b vertex in the U (1) R symmetric minimal supersymmetric extension of the standard model. We find that the predicted value of R b is consistent with experiment if the mass of the lighter top squark is no more than 180 GeV. Furthermore, other data combines to place a lower bound of 88 GeV on the mass of the light top squark. A top squark in this mass range should be accessible to searches by experiments at FNAL and LEP. 1

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Search for the lepton-family-number nonconserving decayμ+→e+γ

Cited by 86 publications

References 26 publications

Gauged flavor group with left-right symmetry

Gauged flavor group with left-right symmetry

Composite leptoquarks at the LHC

μtoeinR-symmetric supersymmetry

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