Electroweak parameters from a high statistics neutrino nucleon scattering experiment

Blondel, A.; Böckmann, P.; Burkhardt, H.; Dydak, F.; Grant, A.; Hagelberg, R.; Hughes, E. W.; Krasny, W.; Para, A.; Taureg, H.; Wachsmuth, H.; Wotschack, J.; Blümer, H.; Brummel, H. D.; Buchholz, P.; Duda, Julia; Kampschulte, B.; Kleinknecht, K.; Knobloch, J.; Müller, E.; Renk, B.; Belusević, R.; Falkenburg, Brigitte; Geiges, R.; Geweniger, C.; Hepp, V.; Keilwerth, H.; Tittel, K.; Abramowicz, H.; Guyot, C.; Merlo, J.-P.; Pérez, P.; Perrier, Frédéric; Schuller, J. P.; Turlay, R.; Vallage, B.; Królikowski, J.; Lipniacka, A.

doi:10.1007/bf01549665

Cited by 87 publications

(32 citation statements)

References 33 publications

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“…where σ theory LO is given by (45) with contact interaction contributions included in the matrix elements. Table IV gives the measured σ had and the calculated values of σ SM NLO .…”

Section: Cdf Drell-yan Cross Sectionsmentioning

confidence: 99%

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Global study of electron-quark contact interactions

et al. 1998

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We perform a global fit of data relevant to eeqq contact interactions, including deep inelastic scattering at high Q 2 from ZEUS and H1, atomic physics parity violation in cesium from JILA, polarized e Ϫ on nuclei scattering experiments at SLAC, Mainz and Bates, Drell-Yan production at the Fermilab Tevatron, the total hadronic cross section had at CERN LEP, and neutrino-nucleon scattering from CCFR. With only the new DESY HERA data, the presence of contact interactions improves the fit compared to the standard model. When other data sets are included, the size of the contact contributions is reduced and the overall fit represents no real improvement over the standard model. ͓S0556-2821͑98͒00201-X͔

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“…where σ theory LO is given by (45) with contact interaction contributions included in the matrix elements. Table IV gives the measured σ had and the calculated values of σ SM NLO .…”

Section: Cdf Drell-yan Cross Sectionsmentioning

confidence: 99%

“…Deep inelastic scattering (DIS) experiments with neutrino and anti-neutrino beams have provided important tests for the SM since the early 80's [44,45]. If SU(2) L invariance is assumed, then νN DIS data also constrain contact interactions.…”

Section: F Neutrino-nucleon Dis Experimentsmentioning

confidence: 99%

Global study of electron-quark contact interactions

et al. 1998

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“…There are several high-precision DIS measurements [15,16,17], CDHS, CHARM and CCFR. The first two experiments are performed with neutrino beam peek energies of about 50 GeV and the same energy spectrum, while CCFR operates with an average energy of 161 GeV.…”

Section: Neutrino Neutral-current Experiments and Bounds On The Four-mentioning

confidence: 99%

Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions

Bilenky¹,

Santamaría

1994

Physics Letters B

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The contributions of non-standard four-neutrino contact interactions to electroweak observables are considered at the one-loop level by using the effective quantum field theory. The analysis is done in terms of three unknown parameters: the strength of the non-standard neutrino interactions,F , an additional derivative coupling needed to renormalize the divergent contributions that appear when the four-neutrino interactions are used at the loop level and a non-standard non-derivative Z-νν coupling. Then, the precise measurements of the invisible width of the Z-boson at LEP and the data on the neutrino deep-inelastic scattering yield the resultF = (−100 ± 140)G F . Assuming that there are no unnatural cancellations between the contributions of the three effective couplings a much stronger bound is obtained: F ∼ < 2G F , which is a factor 200 better than the one obtained in previous analyses based on tree level calculations.

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“…The SM errors are from the inputs as inTable 1. The various quantities R are cross section ratios from ν-hadron scattering, where the CHARM[35] results have been adjusted to CDHS[36] conditions, and can be directly compared. The g V,A are effective four-Fermi couplings from ν-e scattering…”

mentioning

confidence: 99%

Constraints on extended neutral gauge structures

1999

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Indirect precision data are used to constrain the masses of possible extra Z ′ bosons and their mixings with the ordinary Z. We study a variety of Z ′ bosons as they appear in E 6 and left-right unification models, the sequential Z boson, and the example of an additional U (1) in a concrete model from heterotic string theory. In all cases the mixings are severely constrained (sin θ < 0.01). The lower mass limits are generally of the order of several hundred GeV and competitive with collider bounds. The exception is the Z ψ boson, whose vector couplings vanish and whose limits are weaker. The results change little when the ρ parameter is allowed, which corresponds to a completely arbitrary Higgs sector. On the other hand, in specific models with minimal Higgs structures the limits are generally pushed into the TeV region.The possibility of additional neutral gauge bosons, Z ′ s, is among the best motivated types of physics beyond the Standard Model (SM). They are predicted by most unifying theories, such as Grand Unified Theories (GUTs), left-right unification, superstring theories and their strong coupling generalizations. In many cases their masses remain unpredicted and may or may not be of the electroweak scale. In the context of superstring models, however, which are much more constrained than purely field theoretical models, they are often predicted to arise at the electroweak scale, as we will discuss below. In this paper we consider six different types of Z ′ bosons:1. The Z χ boson is defined by SO(10) → SU(5) × U(1) χ . This boson is also the unique solution to the conditions of (i) family universality, (ii) no extra matter other than the right-handed neutrino, (iii) absence of gauge and mixed gauge/gravitational anomalies, and (iv) orthogonality to the hypercharge generator. In the context of a minimal SO(10) GUT, conditions (i) and (ii) are satisfied by assumption, while (iii) and (iv) are automatic. Relaxing condition (iv) allows other solutions (including the Z LR below) which differ from the Z χ by a shift proportional to the third component of the right-handed isospin generator.2. The Z ψ boson is defined by E 6 → SO(10)×U(1) ψ . It possesses only axial-vector couplings to the ordinary fermions. As a consequence it is the least constrained of our examples.

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Electroweak parameters from a high statistics neutrino nucleon scattering experiment

Cited by 87 publications

References 33 publications

Global study of electron-quark contact interactions

Global study of electron-quark contact interactions

Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions

Constraints on extended neutral gauge structures

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