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Search Results: 1 - 10 of 593960 matches for " J. M. Conrad "
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Neutrino Experiments
J. M. Conrad
Physics , 2007,
Abstract: This article is a summary of four introductory lectures on ``Neutrino Experiments,'' given at the 2006 TASI summer school. The purposes were to sketch out the present questions in neutrino physics and to discuss the experimental challenges in addressing them. This article concentrates on specific, illustrative examples rather than providing a complete overview of the field of neutrino physics. These lectures were meant to lay the ground-work for the talks which followed on specific, selected topics in neutrino physics.
Neutrino Scattering on Glass: NuSOnG
J. M. Conrad
Physics , 2007, DOI: 10.1063/1.2898948
Abstract: These proceedings describe the physics goals and initial design for a new experiment: NuSOnG -- Neutrino Scattering On Glass. The design will yield about two orders of magnitude higher statistics than previous high energy neutrino experiments, observed in a detector optimized for low hadronic energy and electromagnetic events. As a result, the purely weak processes $\nu_{\mu}+e^- \to \nu_{\mu}+ e^-$ and $\nu_{\mu}+ e^- \to \nu_e + \mu^-$ (inverse muon decay) can be measured with high accuracy for the first time. This allows important precision electroweak tests and well as direct searches for new physics. The high statistics also will yield the world's largest sample of Deep Inelastic (DIS) events for precision parton distribution studies.
Neutrino Experiments and the LHC: Friends Across 14 Orders of Magnitude
J. M. Conrad
Physics , 2013, DOI: 10.1088/0031-8949/2013/T158/014012
Abstract: This proceeding explores some of the questions that connect the LHC and neutrino experiments: What is the origin of mass? What is the meaning of flavor? Is there direct evidence of new forces or particles? The neutrino program investigating these questions is large and diverse. The strategy here, to narrow the discussion, is to focus on relatively new ideas for experiments that may be less known within the LHC community.
Sensitivity of the Cherenkov Telescope Array to the detection of axion-like particles at high gamma-ray opacities
M. Meyer,J. Conrad
Physics , 2014, DOI: 10.1088/1475-7516/2014/12/016
Abstract: Extensions of the Standard Model of particles commonly predict the existence of axion(-like) particles (ALPs) that could be detected through their coupling to photons in external magnetic fields. This coupling could lead to modifications of $\gamma$-ray spectra from extragalactic sources. Above a certain energy, the $\gamma$-ray flux should be exponentially damped due to the interaction with photons of background radiations fields. ALPs, on the other hand, propagate unimpeded over cosmological distances and a reconversion into $\gamma$-rays could lead to an additional component in the spectra. Here, we present the sensitivity of the proposed Cherenkov Telescope Array (CTA) to detect this spectral hardening. Using the full instrumental response functions of CTA, a combined likelihood analysis of four $\gamma$-ray sources shows that a significant detection of the ALP signal is possible for couplings $g_{a\gamma} \gtrsim 2\times10^{-11}\,\mathrm{GeV}^{-1}$ and ALP masses $m_a \lesssim 100\,\mathrm{neV}$. We discuss the dependency of these values on different model assumptions and magnetic-field scenarios and identify the best observation strategy to search for an ALP induced boost of the $\gamma$-ray flux.
Recent Results on Neutrino Oscillations
J. M. Conrad
Physics , 1998,
Abstract: This article reviews the many new results from neutrino oscillation searches which were presented at ICHEP '98. Exciting indications of neutrino oscillations have been seen in the solar neutrino deficit, atmospheric neutrino deficit and LSND excess. These indications and reported limits on oscillations are considered. Attempts to develop a theory which addresses all of the neutrino oscillation data are discussed. Some of the remaining questions and the future experiments which will help answer these questions are described.
A New Method to Search for CP violation in the Neutrino Sector
J. M. Conrad,M. H. Shaevitz
Physics , 2009, DOI: 10.1103/PhysRevLett.104.141802
Abstract: New low-cost, high-power proton cyclotrons open the opportunity for a novel precision search for CP violation in the neutrino sector. The accelerators can produce decay-at-rest neutrino beams located at multiple distances from a Gd-doped ultra-large water Cerenkov detector in order to search for CP violation in anti-nu_mu to anti-nu_e at short baseline. This new type of search complements presently proposed experiments, providing measurements that could lead to a substantially better exploration of CP violation in the neutrino sector.
Limits on Electron Neutrino Disappearance from the KARMEN and LSND electron neutrino - Carbon Cross Section Data
J. M. Conrad,M. H. Shaevitz
Physics , 2011, DOI: 10.1103/PhysRevD.85.013017
Abstract: This paper presents a combined analysis of the KARMEN and LSND nu_e-carbon cross section measurements within the context of a search for nu_e disappearance at high Delta m^2. KARMEN and LSND were located at 17.7 m and 29.8 m respectively from the neutrino source, so the consistency of the two measurements, as a function of antineutrino energy, sets strong limits on neutrino oscillations. Most of the allowed region from the nu_e disappearance analysis of the Gallium calibration data is excluded at >95% CL and the best fit point is excluded at 3.6$\sigma$. Assuming CPT conservation, comparisons are also made to the oscillation analyses of reactor antineutrino data.
Electron Antineutrino Disappearance at KamLAND and JUNO as Decisive Tests of the Short Baseline Anti-nu_mu to Anti-nu_e Appearance Anomaly
J. M. Conrad,M. H. Shaevitz
Physics , 2013, DOI: 10.1103/PhysRevD.89.057301
Abstract: The IsoDAR antineutrino source, which produces a flux from 8Li isotope decay at rest, when paired with the proposed JUNO (Jiangmen Underground Neutrino Observatory) detector, has unprecedented sensitivity to anti-nu_e disappearance for oscillations at high Delta m^2. Assuming CPT invariance, the sensitive region for anti-nu_e disappearance can be used to restrict the allowed parameter space of an anti-nu_mu to anti-nu_e appearance signal. The 5 sigma sensitivity of this experiment covers the entire anti-nu_mu to anti-nu_e allowed parameter space from a combined fit to short-baseline experiments. This represents a decisive test of the LSND and MiniBooNE antineutrino appearance signals within all models that are $CPT$ invariant. Running IsoDAR at KamLAND restricts a large part of the appearance signal region in a similar way.
Evaluation of Methods for Dissemination of Prostate Cancer Survivorship Guidelines: A Survey of Primary Care Providers  [PDF]
Shawn J. Mendonca, Manijeh Berenji, Conrad M. Tobert, Heather Stetler, Deb Bisel, Brian R. Lane
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.33031

Objectives: To assess potential knowledge gaps between primary care providers (PCPs) and cancer specialists, Michigan Cancer Consortium guidelines were developed and disseminated statewide. We evaluated the impact of dissemination of these guidelines on PCP attitudes and beliefs regarding management of prostate cancer (PC) post-treatment sequelae. Methods: Guidelines were disseminated via hard-copy and web-link mailed to 12,000 Michigan PCPs in 2009, and via 5 CME presentations to 181 PCPs in 2010-2011. 132 initial surveys were collected from CME attendees and 549 follow-up surveys were received 20 months after the initial mailing. Results: Surveyed PCPs indicated erectile dysfunction (88%), incontinence (84%), anxiety (54%) and fear of the unknown (50%) as frequent post-treatment sequelae. A minority of PCPs (≤41%) felt “very comfortable” assessing PC patients for ten post-treatment sequelae at the initial survey, which increased by up to 27% on follow-up survey. 93% of PCPs that received guidelines by mail and CME presentation had incorporated them into practice, compared with 72% of PCPs that received guidelines solely by mailing. Similarly, a greater proportion reported practice pattern changes (65% vs. 34%, p = 0.0003). A higher proportion felt CME events (69% vs. 57%) and expert presentations (64% vs. 44%) were “very effective”, when comparing attendees and non-attendees. Conclusions: Guideline distribution resulted in increased comfort with survivorship issues and incorporation into the practices of the majority of PCPs surveyed. A greater impact was observed in PCPs that attended a CME presentation than in those that received guidelines only by mailing.

Searching for the Lightest Neutralino at Fixed Target Experiments
L. Borissov,J. Conrad,M. Shaevitz
Physics , 2000,
Abstract: Most ongoing supersymmetry searches have concentrated on the high-energy frontier. High-intensity fixed target beamlines, however, offer an opportunity to search for supersymmetric particles with long lifetimes and low cross-sections in regions complementary to the ones accessible to collider experiments. In this paper, we consider R-parity violating supersymmetry searches for the lightest neutralino and use the NuTeV experiment as an example for the experimental sensitivity which can be achieved.
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