Right-Handed b to c Coupling and CP Violation

Hattori, Toshihiko; Hasuike, Tsutom; Hayashi, Toshio; Wakaizumi, Seiichi

doi:10.1143/ptp.93.571

Cited by 6 publications

(7 citation statements)

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“…Furthermore, many extensions of the standard model predict new, effective four-Fermi interactions involving neutrinos, on which we will focus in this paper. General phenomenological studies of these non-standard interactions (NSIs) have been conducted in [1,2,3,4,5,6,7,8], and specific models are discussed in [9,10]. After a work by Grossman [11], which pointed out the importance of NSIs for neutrino oscillation experiments, many authors have investigated their impact in the context of solar neutrinos [12,13,14,15], atmospheric neutrinos [16,17,18,19,20,21], conventional and upgraded neutrino beams [22,23,24,25,26,27,28], neutrino factories [8,23,29,30,31,32,33,34], beta beams [35], supernova neutrinos [36,37], cosmological relic neutrinos [38], e + e − colliders [39], neutrino-electron scattering [40], and neutrino-nucleus scattering [41,42].…”

Section: Introductionmentioning

confidence: 99%

Discovery reach for nonstandard interactions in a neutrino factory

Lindner

Ota

2007

Phys. Rev. D

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We study the discovery reach for Non-Standard Interactions (NSIs) in a neutrino factory experiment. After giving a theoretical, but model-independent, overview of the most relevant classes of NSIs, we present detailed numerical results for some of them. Our simulations take into account matter effects, uncertainties in the neutrino oscillation parameters, systematical errors, parameter correlations, and degeneracies. We perform scans of the parameter space, and show that a neutrino factory has excellent prospects of detecting NSIs originating from new physics at around 1 TeV, which is a scale favored by many extensions of the standard model. It will also turn out that the discovery reach depends strongly on the standard and non-standard CP violating phases in the Lagrangian.

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Section: Introductionmentioning

confidence: 99%

Discovery reach for nonstandard interactions in a neutrino factory

Lindner

Ota

2007

Phys. Rev. D

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“…If we want to probe into such a tiny effect of NSI in the neutrino sector, extremely high sensitivities are required for experiments to detect deviations from the standard three flavor oscillations. A large number of papers in the literature is devoted to discuss NSI in various context including long-baseline accelerator experiments, the atmospheric and the solar neutrino observations, and supernova neutrinos [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Probing non-standard neutrino interactions with neutrino factories

Ribeiro

Minakata

Nunokawa

et al. 2007

J. High Energy Phys.

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We discuss the sensitivity reach of a neutrino factory measurement to non-standard neutrino interactions (NSI), which may exist as a low-energy manifestation of physics beyond the Standard Model. We use the muon appearance modes ν e → ν µ /ν e →ν µ and consider two detectors, one at L = 3000 km and the other at L = 7000 km; The latter is nearly at the magic baseline which is known to have a great sensitivity to matter density determination. Assuming the effects of NSI at the production and the detection are negligible, we discuss the sensitivities to NSI and the simultaneous determination of θ 13 and δ by examining the effects in the neutrino propagation of various systems in which two NSI parameters ε αβ are switched on. The sensitivities to offdiagonal ε's are found to be excellent up to small values of θ 13 . At sin 2 2θ 13 = 10 −4 , for example, |ε eτ | a few×10 −3 at 3σ CL for 2 degrees of freedom, whereas the ones for the diagonal ε's are also acceptable, |ε ee |(|ε τ τ |) 0.1(0.2) at the same CL. We demonstrate that the two-detector setting is powerful enough to resolve the θ 13 -NSI confusion problem, a notorious one which is thought to be an obstacle in determining θ 13 and δ. We believe that the results obtained in this paper open the door to the possibility of using neutrino factory as a discovery machine for NSI while keeping its primary function of performing precision measurements of the lepton mixing parameters.

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“…[58]]. This contribution depends, for instance, on 23 . Since the leading atmospheric parameters cannot be determined precisely without near detectors (see above), there will be some use of the near detectors no matter if the flux is known or not, i.e., the cross section uncertainties will be translated into a background uncertainty.…”

Section: A Qualitative Discussionmentioning

confidence: 99%

Physics with near detectors at a neutrino factory

Tang

Winter

2009

Phys. Rev. D

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We discuss the impact of near detectors at a neutrino factory both on standard oscillation and non-standard interaction measurements. Our systematics treatment includes cross section errors, flux errors, and background uncertainties, and our near detector fluxes include the geometry of the neutrino source and the detector. Instead of a specific detector concept, we introduce qualitatively different classes of near detectors with different characteristics, such as near detectors catching the whole neutrino flux (near detector limit) versus near detectors observing a spectrum similar to that of the far detector (far detector limit). We include the low energy neutrino factory in the discussion. We illustrate for which measurements near detectors are required, discuss how many are needed, and what the role of the flux monitoring is. For instance, we demonstrate that near detectors are mandatory for the leading atmospheric parameter measurements if the neutrino factory has only one baseline, whereas systematical errors partially cancel if the neutrino factory complex includes the magic baseline. Finally, near detectors with nu_tau detection are shown to be useful for non-standard interactions.Comment: 32 pages, 13 figures, 4 tables. Minor changes, clarifications added. Version to appear in Phys. Rev.

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Right-Handed b to c Coupling and CP Violation

Cited by 6 publications

References 0 publications

Discovery reach for nonstandard interactions in a neutrino factory

Discovery reach for nonstandard interactions in a neutrino factory

Probing non-standard neutrino interactions with neutrino factories

Physics with near detectors at a neutrino factory

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