1,939 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Neutrinos"

open access

Neutrino clouds and dark matter

We have examined the consequences of assuming the existence of a light scalar boson, weakly coupled to neutrinos, and not coupled to any other light fermions. For a range of parameters, we find that this hypothesis leads to the development of neutrino clusters which form in the early Universe and which provide gravitational fluctuations on scales small compared to a parsec (i.e., the scale of solar systems). Under some conditions, this can produce anomalous gravitational acceleration within sol… more

Date: December 31, 1996

Creator: Goldman, T.; McKellar, B. H. J. & Stephenson, G. J. Jr.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Detection of Atmospheric Muon Neutrinoswith the IceCube 9-String Detector

The IceCube neutrino detector is a cubic kilometer TeV to PeV neutrino detector under construction at the geographic South Pole. The dominant population of neutrinos detected in IceCube is due to meson decay in cosmic-ray air showers. These atmospheric neutrinos are relatively well understood and serve as a calibration and verification tool for the new detector. In 2006, the detector was approximately 10% completed, and we report on data acquired from the detector in this configuration. We obse… more

Date: May 12, 2007

Creator: Collaboration, IceCube; Klein, Spencer & Achterberg, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Feasibility Study II of a Muon Based Neutrino Source.

The concept of using a muon storage ring to provide a well characterized beam of muon and electron neutrinos (a Neutrino Factory) has been under study for a number of years now at various laboratories throughout the world. The physics program of a Neutrino Factoryis focused on the relatively unexplored neutrino sector. In conjunction with a detector located a suitable distance from the neutrino source, the facility would make valuable contributions to the study of neutrino masses and lepton mix… more

Date: June 30, 2001

Creator: Gallardo, J. C.; Ozaki, S.; Palmer, R. B. & Zisman, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A prototype station for ARIANNA: a detector for cosmic neutrinos

The Antarctic Ross Iceshelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emission from the particle showers produced by neutrinos with energies above about 1017 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km2 in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity … more

Date: May 27, 2010

Creator: Gerhardt, L.; Klein, S.; Stezelberger, T.; Barwick, S.; Dookayka, K.; Hanson, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Charged current disappearance measurements in the NuMI off-axis beam

This article studies the potential of combining charged-current disappearance measurements of {nu}{sub {mu}} {yields} {nu}{sub {tau}} from MINOS and an off-axis beam. The author finds that the error on {Delta}m{sup 2} from a 100 kt-yr off-axis measurement is a few percent of itself. Further, the author found little improvement to an off-axis measurement by combining it with MINOS.

Date: September 25, 2003

Creator: Bernstein, R. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Electron Neutrino Appearance in the MINOS Experiment

The MINOS experiment is a long-baseline neutrino oscillation experiment which sends a high intensity muon neutrino beam through two functionally identical detectors, a Near detector at the Fermi National Accelerator Laboratory in Illinois, 1km from the beam source, and a Far detector, 734km away, in the Soudan Mine in Minnesota. MINOS may be able to measure the neutrino mixing angle parameter sin{sup 2} 2{theta}{sub 13} for the first time. Detector granularity, however, makes it very hard to di… more

Date: June 1, 2010

Creator: Holin, Anna Maria & London, /University Coll.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

A study of muon neutrino disappearance in the MINOS detectors and the NuMI beam

There is now substantial evidence that the proper description of neutrino involves two representations related by the 3 x 3 PMNS matrix characterized by either distinct mass or flavor. The parameters of this mixing matrix, three angles and a phase, as well as the mass differences between the three mass eigenstates must be determined experimentally. The Main Injector Neutrino Oscillation Search experiment is designed to study the flavor composition of a beam of muon neutrinos as it travels betwe… more

Date: January 1, 2010

Creator: Ling, Jiajie

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

Progress Report to the U.S. Department of Energy, Grant DE-FG02-91ER40626: Neutrino Physics, Particle Theory and Cosmology

This a progress report on the first year of a three-year renewal of DE-FG02-91ER40626.

Date: July 30, 2009

Creator: Shafi, Qaisar; Barr, Stephen M; Gaisser, Thomas K & Stanev, Todor

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Search for electron neutrino appearance at the Delta m2 ~ 1- eV2 scale

The MiniBooNE Collaboration reports first results of a search for {upsilon}{sub e} appearance in a {upsilon}{sub {mu}} beam. With two largely independent analyses, we observe no significant excess of events above background for reconstructed neutrino energies above 475 MeV. The data are consistent with no oscillations within a two neutrino appearance-only oscillation model.

Date: April 1, 2007

Creator: Aguilar-Arevalo, A. A.; Bazarko, A. O.; Brice, S. J.; Brown, B. C.; Bugel, L.; Cao, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LATEST RESULTS FROM MINOS.

Among the goals of the MINOS experiment are the test of the {nu}{sub {mu}} {yields} {nu}{sub {tau}} oscillation and the search for sub-dominant {nu}{sub {mu}} {yields} {nu}{sub {tau}} oscillations. The former proceeds by a {nu}{sub {mu}} ''disappearance'' analysis while the latter would involve the ''appearance'' of {nu}{sub e} interactions in a predominantly {nu}{sub {mu}} beam. The disappearance of muon neutrinos is described by P({nu}{sub {mu}} {yields} {mu}{sub {mu}}) = 1 - sin{sup 2} 2{the… more

Date: October 26, 2006

Creator: JAFFE,D.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Search for muon neutrinos from Gamma-Ray Bursts with the IceCube neutrino telescope

We present the results of searches for high-energy muon neutrinos from 41 gamma- ray bursts (GRBs) in the northern sky with the IceCube detector in its 22-string con-figuration active in 2007/2008. The searches cover both the prompt and a possible precursor emission as well as a model-independent, wide time window of -1 h to +3 haround each GRB. In contrast to previous searches with a large GRB population, we do not utilize a standard Waxman?Bahcall GRB flux for the prompt emission but calcu- l… more

Date: January 19, 2010

Creator: Collaboration, IceCube & Abbasi, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

[Workshop on Current Problems in Particle Theory]. Final Report on Agreement No. D36 2042

A description is given of the 23rd Johns Hopkins Workshop on Current Problems in Particle Theory, held at The Johns Hopkins University in June 1999.

Date: January 1, 2000

Creator: Domokos, G. & Kovesi-Domokos, S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The Majorana Zero-Neutrino Double-Beta Decay Experiment White Paper

The goal of the Majorana Experiment is to determine the effective Majorana masss of the eletron neutrino. Detection of the neutrino mass implied by oscillation results in within our grasp. This exciting physics goal is best pursued using double-beta decay of germanium because of the historical and emerging advances in eliminating competing signals from radioactive backgrounds. The Majorana Experiment will consist of a large mass of 76Ge in the form of high-resolution detectors deep underground,… more

Date: March 7, 2002

Creator: Gaitskell, R.; Barabash, A.; Konovalov, S.; Stekhanov, V.; Umatov,, V.; Brudanin, V. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

NUFACT00: Interface between machine and physics working group summary

The goal of Working Group 3 at NUFACT00 was to arrive at a set of neutrino factory parameters, taking into account physics needs and accelerator limitations. Fortunately there has been much work on both the machine design and the physics phenomenology since the first neutrino factory proposal based on a very intense muon source was made in November 1997. In addition the discussions and consensus at NUFACT99 formed a solid foundation for the phenomenological work done between NUFACT99 and NUFACT… more

Date: January 23, 2001

Creator: Cadenas, Juan Jose Gomez & Mori, Steve Geer and Yoshi

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A search for muon neutrino to electron neutrino oscillations at delta(m^2)>0.1 eV^2

The evidence is compelling that neutrinos undergo flavor change as they propagate. In recent years, experiments have observed this phenomenon of neutrino oscillations using disparate neutrino sources: the sun, fission reactors, accelerators, and secondary cosmic rays. The standard model of particle physics needs only simple extensions - neutrino masses and mixing - to accommodate all neutrino oscillation results to date, save one. The 3.8{sigma}-significant {bar {nu}}{sub e} excess reported by … more

Date: November 1, 2007

Creator: Patterson, Ryan Benton

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

“Geant Simulation of Muon Cooling Rings,” “Ionization Cooling Ring for Muons,” “Geant Simulation of Six-Dimensional Cooling of Muon Beams in Ring Coolers,” “Recent Progress in Neutrino Factory and Muon Collider Research Within the Muon Collaboration,” “Towards the Higgs Factory/Muon Collider,” “Status of R&D on Neutrino Factories and Muon Colliders,” “Feasibility Study-II of a Muon-Based Neutrino Source,” “A Muon Collider as a Higgs Factory,” “Higgs Factory Muon Collider,” “A Muon Collider as a Higgs Factory,” “A Feasibility Study of a Neutrino Source Based on a Muon Storage Ring,” “Status of Muon Collider Research and Development and Future Plans,”

FINAL TECHNICAL REPORT FOR DOE AWARD DE-FG02-03ER41267 NEUTRINO FACTORY AND MUON COLLIDER FELLOW 1. Introduction By providing an intense, well controlled, well characterized, narrow beam of muon neutrinos (’s) and electron antineutrinos ( ’s) from the decay of muons (’s) in a storage ring, a neutrino factory can advance neutrino physics beyond the current round of approved and proposed experiments using conventional neutrino beams produced from a beam of decaying pions and kaons [1, 2]. The… more

Date: June 21, 2006

Creator: Klier, G. G. Hanson and A.; R. Palmer,; Amit Klier and Gail G. Hanson,; Mohammad M. Alsharo’a, et al,; G. Hanson,; G. Hanson, et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Muon neutrino disappearance at MINOS

A strong case has been made by several experiments that neutrinos oscillate, although important questions remain as to the mechanisms and precise values of the parameters. In the standard picture, two parameters describe the nature of how the neutrinos oscillate: the mass-squared difference between states and the mixing angle. The purpose of this thesis is to use data from the MINOS experiment to precisely measure the parameters associated with oscillations first observed in studies of atmosphe… more

Date: August 1, 2009

Creator: Armstrong, R.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

SO(10) SUSY GUT model with a U(1) x Z2 x Z2 flavor s

An SO(10) SUSY GUT model which leads to maximal atmospheric neutrino mixing and the LMA solar neutrino solution, developed in collaboration with S.M. Barr, is briefly described. Since the model is quantitatively predictive, it can be used to assess the need for a neutrino factory, as shown in collaboration with S. Geer.

Date: November 1, 2001

Creator: Albright, Carl H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A measurement of hadron production cross sections for the simulation of accelerator neutrino beams and a search for muon-neutrino to electron-neutrino oscillations in the delta m2 about equals 1-eV2 region

A measurement of hadron production cross-sections for the simulation of accelerator neutrino beams and a search for muon neutrino to electron neutrino oscillations in the {Delta}m{sup 2} {approx} 1 eV{sup 2} region. This dissertation presents measurements from two different high energy physics experiments with a very strong connection: the Hadron Production (HARP) experiment located at CERN in Geneva, Switzerland, and the Mini Booster Neutrino Experiment (Mini-BooNE) located at Fermilab in Bata… more

Date: January 1, 2008

Creator: Schmitz, David W.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

Determination of the Atmospheric Neutrino Flux and Searches for New Physics with AMANDA-II

The AMANDA-II detector, operating since 2000 in the deep ice at the geographic South Pole, has accumulated a large sample of atmospheric muon neutrinos in the 100 GeV to 10 TeV energy range. The zenith angle and energy distribution of these events can be used to search for various phenomenological signatures of quantum gravity in the neutrino sector, such as violation of Lorentz invariance (VLI) or quantum decoherence (QD). Analyzing a set of 5511 candidate neutrino events collected during 1387… more

Date: June 2, 2009

Creator: Collaboration, IceCube; Klein, Spencer & Collaboration, IceCube

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Determining neutrino mass hierarchy by precise measurements of two delta m**2 in electron-neutrino and muon-neutrino disappearance experiments

In this talk, the authors discuss the possibility of determining the neutrino mass hierarchy by comparing the two effective atmospheric neutrino mass squared differences measured, respectively, in electron, and in muon neutrino disappearance oscillation experiments. if the former, is larger (smaller) than the latter, the mass hierarchy is of normal (inverted) type. They consider two very high precision (a few per mil) measurements of such mass squared differences by the phase II of the T2K (Tok… more

Date: September 1, 2006

Creator: Minakata, H.; U., /Tokyo Metropolitan; Nunokawa, H.; /Rio de Janeiro, Pont. U. Catol.; Parke, Stephen J.; /Fermilab et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Status of the MINOS Experiment

We report on the status of the MINOS long baseline neutrino experiment presently under construction at the Fermi National Accelerator Laboratory and the Soudan mine. There is growing evidence that the solar neutrino and atmospheric neutrino anomalies [1] are the result of neutrino oscillations. The MINOS experiment is a long baseline neutrino oscillation experiment designed to study the region of parameter space indicated by the SuperKamiokande atmospheric neutrino results [2]. The experiment c… more

Date: March 17, 2003

Creator: Buckley-Geer, Elizabeth

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Search for Electron Neutrino Appearance in MINOS

The MINOS Collaboration continues its search for {nu}{sub e} appearance in the NuMI (Neutrinos at the Main Injector) beam at Fermilab. Neutrinos in the beam interact in the Near Detector, located 1 km from the beam source, allowing us to characterize the backgrounds present in our analysis. In particular, we can estimate the number of {nu}{sub e} candidate events we expect to see in the Far Detector (735 km away, in the Soudan mine in northern Minnesota) in the presence or absence of {nu}{sub {… more

Date: September 1, 2011

Creator: Orchanian, Mhair & /Caltech

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LSND neutrino oscillation results

The LSND experiment at Los Alamos has conducted searches for {anti {nu}}{sub {mu}} {r_arrow} {anti {nu}}{sub e} oscillations using {anti {nu}}{sub {mu}} from U{sup +} decay at rest and for {nu}{sub {mu}} {r_arrow} {nu}{sub e} oscillations using {nu}{sub {mu}} from {pi}{sup +} decay in flight. For the {anti {nu}}{sub {mu}} {r_arrow} {anti {nu}}{sub e} search, a total excess of 51.8{sub {minus}16.9}{sup +18.7} {+-} 8.0 events is observed with e{sup +} energy between 20 and 60 MeV, while for the {… more

Date: June 1, 1997

Creator: Louis, W.C. & Collaboration, LSND

Item Type: Article

Partner: UNT Libraries Government Documents Department