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in subjects: "Neutral-Current Interactions"

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Inclusive Charged- and Neutral-Current Antineutrino-Proton Interactions at High Energy. [Cross Sections, Quark-Parton Model]

Results on antineutrino-proton interactions observed in the Fermilab 15-foot hydrogen bubble chamber are presented. The charged-current semi-inclusive distributions, as a function of X, Y, Q/sup 2/ and W, are compared with the predictions of the naive quark parton model. Within statistics, no marked dependence of the Y distribution on E/sub nu/ was observed. R/sub anti nu/, the antineutrino neutral-current to charged-current cross section ratio is calculated, and results are presented as a func… more

Date: January 1, 1976

Creator: Derrick, M.; Dombeck, T. & Hyman, L. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Neutral-current interactions in hydrogen and deuterium. [Cross sections, mass and angular distributions]

Data are presented on neutral-current interactions from two experiments on the reactions, ..nu..n ..-->.. ..nu..p..pi../sup -/. Cross sections and mass, angular, and flux distributors are given. (JFP)

Date: January 1, 1976

Creator: Schreiner, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Neutral-Current Detection in the Sudbury Neutrino Observatory

The Sudbury Neutrino Observatory (SNO) will have the capability of detecting all active species of neutrinos with energies greater than 2.2 MeV by the neutral-current disintegration of deuterium. The comparison of this rate with the rate of inverse beta decay of the deuteron will yield a nearly model-independent answer to the question of whether electron neutrinos from the sun oscillate into mu or tau neutrinos. The signal of a neutral-current interaction is the liberation of a free neutron in … more

Date: June 1, 1993

Creator: Bowles, Thomas J.; Doe, Peter J.; Fowler, Malcolm M.; Hime, Andrew; Robertson, R. G. Hamish; Thornewell, Peter M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of. nu. p. --> nu. p and anti. nu. p. -->. anti. nu. p elastic scattering. [Differential cross sections, systematic errors, coupling-constant constraints, form factors]

There were 217 (66) events of the process ..nu..p..--> nu..p (anti ..nu..p..-->..anti..nu..p) with an estimated background of 82 (28). The neutral to charged current ratios are sigma(..nu..p..--> nu..p)/sigma(..nu..n..--> mu../sup -/p) = 0.11 +- 0.02 and sigma(anti ..nu..p ..-->.. anti ..nu..p)/sigma (anti ..nu..p ..-->.. ..mu../sup +/n) = 0.19 +- 0.05 for 0.40 < q/sup 2/ < 0.90 (GeV/c)/sup 2/ where -q/sup 2/ is the square of the four momentum transfer to the proton. These yield sigma(anti ..nu… more

Date: January 1, 1978

Creator: Williams, H. H.; Entenberg, A.; Kozanecki, W.; Horstkotte, J.; Mann, A. K.; Rubbia, C. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Recent results from neutrino interactions in heavy neon

We report recent results from an analysis of 100,000 pictures from the Fermilab 15 ft. bubble chamber filled with heavy neon and exposed to the double horn focused, wideband ..nu../sub ..mu../ beam. We have found 164 dilepton (..mu../sup -/e/sup +/) events with 33 vees, in good agreement with the GIM model of charm production. We have also observed the production of the charmed D/sup 0/ meson, followed by the decay D/sup 0/ ..-->.. K/sup 0/..pi../sup +/..pi../sup -/, at a rate of (0.7 +- 0.2… more

Date: January 1, 1978

Creator: Baltay, C; Caroumbalis, D & French, H

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Search for Horizontal Bosons at the SSC

The production process anti p p ..-->.. l/sup -/l'/sup +/ + X, where the leptons belong to two different generations and X refers to spectator jets, provides a clear signature for horizontal (generation-changing) bosons when the leptons are emitted nearly back-to-back and p/sub T//sup miss/ = 0. Cross sections and p/sub T/ distributions for each lepton are presented, and discovery limits on M/sub H/ are extracted for several different channels.

Date: January 1, 1984

Creator: Albright, C. H.; Deshpande, N. G.; Gunion, J. F. & Haber, H. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Elastic neutrino electron scattering at Brookhaven

A progress report is given of Experiment 734 at Brookhaven, with a focus on the elastic reactions nu/sub ..mu../ + e/sup -/ ..-->.. nu/sub ..mu../ + e/sup -/ and anti nu/sub ..mu../ + e/sup -/ ..-->.. anti nu/sub ..mu../ + e/sup -/. The present status, recent results, and future plans are discussed.

Date: January 1, 1984

Creator: Cutts, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Research program in experimental high energy physics. Progess report, January 1, 1978--December 31, 1978. [Summaries of research activities at Brown University]

An experimental program in strong and weak interaction physics of elementary particles is carried out using electronic detection techniques and a hybrid bubble chamber system. Experiments are performed and proposed utilizing the accelerators of the laboratories at Brookhaven, Batavia, and Stanford. These studies will yield more precise results on the particle production mechanisms of the five different projectile particles under identical experimental conditions. A list of publications is inclu… more

Date: October 9, 1978

Creator: Shapiro, A. M. & Lanou Jr., R. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Observation of the process. nu. /sub. mu. / + e/sup -/. -->. nu. /sub. mu. / + e/sup -/ at high energies. [Preliminary results, Weinberg-Salam model, mixing angle]

There were 5 events of the reaction ..nu../sub ..mu../ + e/sup -/ ..-->.. ..nu../sub ..mu../ + e/sup -/ in a sample of approximately 50,000 charged current neutrino interactions in a heavy neon-hydrogen mixture in the 15 foot bubble chamber at Fermilab. This result is in rough agreement with the prediction of the Weinberg-Salam model with the currently favored value of the mixing angle, sin/sup 2/ theta approximately 1/4.

Date: January 1, 1978

Creator: Baltay, C; Caroumbalis, D & French, H

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Weak-neutral-current elastic scattering of neutrinos

We present progress to date in an experiment (E0734) to measure neutral current phenomena at low neutrino energy (200 less than or equal to E/sub nu/ less than or equal to 3 GeV). The principal goals center upon the elastic reactions: anti nu/sub ..mu../ + p ..-->.. anti nu/sub ..mu../ + p, and anti nu/sub ..mu../ + e ..-->.. anti nu/sub ..mu../ + e.

Date: January 1, 1982

Creator: Lanou, R. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Departure from Weinberg-Salam model and grandunification

The spontaneous breaking of grandunified groups like SO(10) or SU(8) x SU(8) can lead to an extra U(1) group beyond Weinberg-Salam (W-S) SU(2) x U(1). Neutral current data are now shown to depend on two more parameters. The data are examined and limits are put on the mass of the extra Z boson. Need for more experiments on parity violation effects in atoms is stressed. 2 figures, 1 table.

Date: January 1, 1980

Creator: Deshpande, N.G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Charged and neutral current couplings of quarks (as seen by neutrinos). [Cross sections]

Aspects of charged-current scattering including the question of whether the cross sections are ''anomalous'' in any sense and the subject of limits on the production of new heavy quarks are discussed. A new, unique determination of neutral-current couplings is discussed using data from deep-inelastic and elastic neutrino scatterings and from neutrino-induced exclusive and inclusive pion production. Charged-current couplings are treated in the context of the Weinberg-Salam (WS) theory of weak an… more

Date: April 1, 1978

Creator: Barnett, R. Michael

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Recent results from neutrino interactions in heavy neon

Recent results are reported from an analysis of 100,000 pictures of the Fermilab 15 ft. bubble chamber filled with heavy neon and exposed to the double horn focused, wideband ..nu../sub ..mu../ beam. There were 164 dilepton (..mu../sup -/e/sup +/) events with 33 vees, in good agreement with the GIM model of charm production. Also the production of the charmed D/sup 0/ meson, followed by the decay D/sup 0/ ..-->.. K/sup 0/..pi../sup +/..pi../sup -/, at a rate of (0.7 +- 0.2)% of all charged c… more

Date: January 1, 1978

Creator: Baltay, C; Caroumbalis, D & French, H

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Weak interactions. [SU(2) symmetry, electromagnetic correction]

The weak interaction is studied from a phenomenological viewpoint. The aim is to describe the present situation concisely, using a minimal number of theoretical hypotheses. First, charged-current phenomenology is discussed, then neutral-current phenomenology. This can all be described in terms of a global SU(2) symmetry plus an electromagnetic correction. The intermediate-boson hypothesis is then introduced, and lower bounds are inferred on the range of the weak force. 18 references. (JFP)

Date: June 1, 1978

Creator: Bjorken, J. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Weak neutral-current interactions

The roles of each type of experiment in establishing uniquely the values of the the neutral-current couplings of u and d quarks are analyzed together with their implications for gauge models of the weak and electromagnetic interactions. An analysis of the neutral-current couplings of electrons and of the data based on the assumption that only one Z/sup 0/ boson exists is given. Also a model-independent analysis of parity violation experiments is discussed. 85 references. (JFP)

Date: August 1, 1978

Creator: Barnett, R.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Data Acquisition for a Large Neutrino Detector

A hierarchical, distributed intelligence data acquisition system which has been used for the past two years in neutrino experiments at Brookhaven National Laboratory is described. Performance characteristics and the nature of problems encountered in bringing the system to maturity are discussed and some generalizations of the experience are suggested.

Date: January 1, 1983

Creator: Ahrens, L. A.; Aronson, S. A. & Connolly, P. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Neutral-current detection in the Sudbury Neutrino Observatory

Date: January 1, 1993

Creator: Bowles, T. J.; Doe, P. J.; Fowler, M. M.; Hime, A.; Robertson, R. G. H.; Thornewell, P. M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Minimally Extended Elctroweak Gauge Theories in SO(10) and E/sub 6/

The possibility of minimally extending the standard SU(2)/sub L/xU(1) electroweak theory within the context of SO(10) and E/sub 6/ grand unification by adding U(1) factors is explored. The neutrino neutral-current interactions in these schemes are arranged to coincide with the standard-model predictions. Limits on the masses of the extra Z's generated by these U(1) factors are obtained by considering other parity-violating effects. Additional Z's as light as 2.5 to 3.0 times the standard model … more

Date: November 1, 1982

Creator: Robinett, R. W. & Rosner, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Higgs boson production by very high energy neutrinos. [1 to 1000 TeV, cross sections]

Higgs bosons may be produced by bremsstrahlung off a virtual W/sup +-/ or a Z/sup 0/ exchanged in a charged or neutral current neutrino interaction. The production cross sections are calculated, and it is pointed out that they cannot grow quadratically with E/sub nu/ as had been suggested earlier, and it is argued that at best they can increase like the square of ln s/M/sup 2//sub W,Z/ at very high energies. Using a simple approximation for the propagator effect, numerical results in the high e… more

Date: November 1, 1978

Creator: Mikaelian, K.O. & Oakes, R.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Progress in an Experiment to Measure Elastic Nu. Mu. E. -->. Nu. Mu. E Scattering

The experimental setup and preliminary results of nu..mu.. + e elastic scattering measurements are described. (WHK)

Date: January 1, 1983

Creator: Abe, K.; Ahrens, L. A. & Amako, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A Search for Flavour Changing Neutral Current Processes in Decays of Charmed Mesons

Neutral current interactions are known from studies of K meson decays to conserve flavor to a high precision. Although flavor changing neutral currents (FCNC) are forbidden in the Weinberg-Salam model, many extensions of the Standard Model allow such processes. We present preliminary upper limits on FCNC-mediated decays of charmed particles, namely D/sup 0/ ..-->.. e/sup +/e/sup -/, D/sup 0/ ..-->.. ..mu../sup +/..mu../sup -/, D/sup 0/ ..-->.. ..mu..e and D/sup +/ ..-->.. ..pi../sup +/..mu..e.

Date: September 1, 1987

Creator: Anjos, J. C.; Appel, J. A.; Bracker, S. B.; Browder, T. E.; Cremaldi, L. M.; Elliott, J. R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Weak interactions of quarks and leptons: experimental status

The present experimental status of weak interactions is discussed with emphasis on the problems and questions and on the possible lines of future investigations. Major topics include; (1) the quark mixing matrix, (2) CP violation, (3) rare decays, (4) the lepton sector, and (5) right handed currents. 118 references. (WHK)

Date: September 1, 1984

Creator: Wojcicki, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of the scaling x and y distributions of neutral and charged current nu/sub. mu. / interactions

We report on a joint study of the neutral and charged current reactions nu/sub ..mu../ + Ne ..-->.. h + nu/sub ..mu../ and nu/sub ..mu../ + Ne h + ..mu../sup -/. With the aim to obtain distributions in the scaling variables x and y. The experiment was performed at the FNAL narrow band neutrino beam (neutrino energies up to 240 GeV; mean energy: 60 GeV) and used the 15-foot bubble chamber filled with a heavy neon-hydrogen mix (59 atomic percent of neon) to detect neutrino interactions. The narro… more

Date: January 1, 1983

Creator: Baltay, C.; Bregman, M.; Caroumbalis, D.; Chen, L.D.; French, H.; Hibbs, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Research program in experimental high energy physics. Task C. Progress report, January 1, 1979-December 31, 1979. [Summaries of research activities at Brown Univ]

An experimental program in strong and weak interaction physics of elementary particles is being carried out using electronic detection techniques. Experiments have been performed or have been proposed utilizing the accelerators of the laboratories at Brookhaven, Fermilab, LAMPF, and SLAC. The experiments described by the Electronic Detector Group include the following: an analysis of resonances in the proton-antiproton system, a study of inclusive scattering in hadron reactions of the form a + … more

Date: October 1, 1979

Creator: Lanou, R.E. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department