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Title: Roadmap for the international, accelerator-based neutrino programme

Abstract

In line with its terms of reference the ICFA Neutrino Panel has developed a roadmap for the international, accelerator-based neutrino programme. A "roadmap discussion document" was presented in May 2016 taking into account the peer-group-consultation described in the Panel's initial report. The "roadmap discussion document" was used to solicit feedback from the neutrino community---and more broadly, the particle- and astroparticle-physics communities---and the various stakeholders in the programme. The roadmap, the conclusions and recommendations presented in this document take into account the comments received following the publication of the roadmap discussion document. With its roadmap the Panel documents the approved objectives and milestones of the experiments that are presently in operation or under construction. Approval, construction and exploitation milestones are presented for experiments that are being considered for approval. The timetable proposed by the proponents is presented for experiments that are not yet being considered formally for approval. Based on this information, the evolution of the precision with which the critical parameters governinger the neutrino are known has been evaluated. Branch or decision points have been identified based on the anticipated evolution in precision. The branch or decision points have in turn been used to identify desirable timelines for the neutrino-nucleusmore » cross section and hadro-production measurements that are required to maximise the integrated scientific output of the programme. The branch points have also been used to identify the timeline for the R&D required to take the programme beyond the horizon of the next generation of experiments. The theory and phenomenology programme, including nuclear theory, required to ensure that maximum benefit is derived from the experimental programme is also discussed.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12];  [13];  [14];  [15];  [4]
  1. Beijing, Inst. High Energy Phys. (China)
  2. Northwestern Univ., Evanston, IL (United States)
  3. CNRS/IN2P3. Univ. Paris (France). Observatoire de Paris. AstroParticule et Cosmologie (APC)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  5. Federal University of Goias (Brazil)
  6. Seoul National Univ. (Korea, Republic of)
  7. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  8. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL)
  9. Autonomous Univ. of Madrid (Spain)
  10. Univ. of Padua (Italy)
  11. Tata Inst. of Fundamental Research, Bombay (India)
  12. Univ. of Tokyo (Japan)
  13. Univ. of Wroclaw (Poland)
  14. TRIUMF, Vancouver, BC (Canada)
  15. Imperial College, London (United Kingdom)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1365576
Report Number(s):
arXiv:1704.08181; FERMILAB-FN-1031
1596901; TRN: US1701929
DOE Contract Number:
AC02-07CH11359
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NEUTRINOS; ACCELERATORS; NUCLEAR THEORY; PARTICLES

Citation Formats

Cao, J., de Gouvêa, A., Duchesneau, D., Geer, S., Gomes, R., Kim, S. B., Kobayashi, T., Long, K., Maltoni, M., Mezzetto, M., Mondal, N., Shiozawa, M., Sobczyk, J., Tanaka, H. A., Wascko, M., and Zeller, G.. Roadmap for the international, accelerator-based neutrino programme. United States: N. p., 2017. Web. doi:10.2172/1365576.
Cao, J., de Gouvêa, A., Duchesneau, D., Geer, S., Gomes, R., Kim, S. B., Kobayashi, T., Long, K., Maltoni, M., Mezzetto, M., Mondal, N., Shiozawa, M., Sobczyk, J., Tanaka, H. A., Wascko, M., & Zeller, G.. Roadmap for the international, accelerator-based neutrino programme. United States. doi:10.2172/1365576.
Cao, J., de Gouvêa, A., Duchesneau, D., Geer, S., Gomes, R., Kim, S. B., Kobayashi, T., Long, K., Maltoni, M., Mezzetto, M., Mondal, N., Shiozawa, M., Sobczyk, J., Tanaka, H. A., Wascko, M., and Zeller, G.. Wed . "Roadmap for the international, accelerator-based neutrino programme". United States. doi:10.2172/1365576. https://www.osti.gov/servlets/purl/1365576.
@article{osti_1365576,
title = {Roadmap for the international, accelerator-based neutrino programme},
author = {Cao, J. and de Gouvêa, A. and Duchesneau, D. and Geer, S. and Gomes, R. and Kim, S. B. and Kobayashi, T. and Long, K. and Maltoni, M. and Mezzetto, M. and Mondal, N. and Shiozawa, M. and Sobczyk, J. and Tanaka, H. A. and Wascko, M. and Zeller, G.},
abstractNote = {In line with its terms of reference the ICFA Neutrino Panel has developed a roadmap for the international, accelerator-based neutrino programme. A "roadmap discussion document" was presented in May 2016 taking into account the peer-group-consultation described in the Panel's initial report. The "roadmap discussion document" was used to solicit feedback from the neutrino community---and more broadly, the particle- and astroparticle-physics communities---and the various stakeholders in the programme. The roadmap, the conclusions and recommendations presented in this document take into account the comments received following the publication of the roadmap discussion document. With its roadmap the Panel documents the approved objectives and milestones of the experiments that are presently in operation or under construction. Approval, construction and exploitation milestones are presented for experiments that are being considered for approval. The timetable proposed by the proponents is presented for experiments that are not yet being considered formally for approval. Based on this information, the evolution of the precision with which the critical parameters governinger the neutrino are known has been evaluated. Branch or decision points have been identified based on the anticipated evolution in precision. The branch or decision points have in turn been used to identify desirable timelines for the neutrino-nucleus cross section and hadro-production measurements that are required to maximise the integrated scientific output of the programme. The branch points have also been used to identify the timeline for the R&D required to take the programme beyond the horizon of the next generation of experiments. The theory and phenomenology programme, including nuclear theory, required to ensure that maximum benefit is derived from the experimental programme is also discussed.},
doi = {10.2172/1365576},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2017},
month = {Wed Apr 26 00:00:00 EDT 2017}
}

Technical Report:

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  • We report on further SLAC measurements of the Askaryan effect: coherent radio emission from charge asymmetry in electromagnetic cascades. We used synthetic rock salt as the dielectric medium, with cascades produced by GeV bremsstrahlung photons at the Final Focus Test Beam. We extend our prior discovery measurements to a wider range of parameter space and explore the effect in a dielectric medium of great potential interest to large scale ultra-high energy neutrino detectors: rock salt (halite), which occurs naturally in high purity formations containing in many cases hundreds of cubic km of water-equivalent mass. We observed strong coherent pulsed radiomore » emission over a frequency band from 0.2-15 GHz. A grid of embedded dual-polarization antennas was used to confirm the high degree of linear polarization and track the change of direction of the electric-field vector with azimuth around the shower. Coherence was observed over 4 orders of magnitude of shower energy. The frequency dependence of the radiation was tested over two orders of magnitude of UHF and microwave frequencies. We have also made the first observations of coherent transition radiation from the Askaryan charge excess, and the result agrees well with theoretical predictions. Based on these results we have performed detailed and conservative simulation of a realistic GZK neutrino telescope array within a salt-dome, and we find it capable of detecting 10 or more contained events per year from even the most conservative GZK neutrino models.« less
  • The purpose of this paper is to provoke a discussion about the right next step in accelerator-based neutrino physics. In the next five years many experiments will be done to determine the neutrino mixing parameters. However, the small parameters theta{sub 13}, Delta-m{sub 21}{sup 2}, and the CP violating phase are unlikely to be well determined. Here, the author looks at the potential of high-intensity, low-energy, narrow-band conventional neutrino beams to determine these parameters. He finds, after roughly estimating the possible intensity and purity of conventional neutrino and anti-neutrino beam, that sin2 theta13 can be measured if greater than a fewmore » parts in ten thousand, Delta-m{sub 21}{sup 2} can be measured if it is greater than 4 x 10{sup {minus}5} (eV){sup 2}, and the CP violating phase can be measured if it is greater than 20{degree} and the other parameters are not at their lower bounds. If these conclusions stand up to more detailed analysis, these experiments can be done long before a muon storage ring source could be built and at much less cost.« less
  • Neutrinos are among nature`s fundamental constituents, and they are also the ones about which we know least. Their role in the universe is widespread, ranging from the radioactive decay of a single atom to the explosions of supernovae and the formation of ordinary matter. Neutrinos might exhibit a striking property that has not yet been observed. Like the back-and-forth swing of a pendulum, neutrinos can oscillate to-and-from among their three types (or flavors) if nature provides certain conditions. These conditions include neutrinos having mass and a property called {open_quotes}mixing.{close_quotes} The phenomenon is referred to as neutrino oscillations. The questions ofmore » the origin of neutrino mass and mixing among the neutrino flavors are unsolved problems for which the Standard Model of particle physics holds few clues. It is likely that the next critical step in answering these questions will result from the experimental observation of neutrino oscillations. The High Energy Physics Advisory Panel (HEPAP) Subpanel on Accelerator-Based Neutrino Oscillation Experiments was charged to review the status and discovery potential of ongoing and proposed accelerator experiments on neutrino oscillations, to evaluate the opportunities for the U.S. in this area of physics, and to recommend a cost-effective plan for pursuing this physics, as appropriate. The complete charge is provided in Appendix A. The Subpanel studied these issues over several months and reviewed all the relevant and available information on the subject. In particular, the Subpanel reviewed the two proposed neutrino oscillation programs at Fermi National Accelerator Laboratory (Fermilab) and at Brookhaven National Laboratory (BNL). The conclusions of this review are enumerated in detail in Chapter 7 of this report. The recommendations given in Chapter 7 are also reproduced in this summary.« less
  • No abstract prepared.
  • Over a full two day period, February 2–3, 2016, the Office of High Energy Physics convened a workshop in Gaithersburg, MD to seek community input on development of an Advanced Accelerator Concepts (AAC) research roadmap. The workshop was in response to a recommendation by the HEPAP Accelerator R&D Subpanel [1] [2] to “convene the university and laboratory proponents of advanced acceleration concepts to develop R&D roadmaps with a series of milestones and common down selection criteria towards the goal for constructing a multi-TeV e+e– collider” (the charge to the workshop can be found in Appendix A). During the workshop, proponentsmore » of laser-driven plasma wakefield acceleration (LWFA), particle-beam-driven plasma wakefield acceleration (PWFA), and dielectric wakefield acceleration (DWFA), along with a limited number of invited university and laboratory experts, presented and critically discussed individual concept roadmaps. The roadmap workshop was preceded by several preparatory workshops. The first day of the workshop featured presentation of three initial individual roadmaps with ample time for discussion. The individual roadmaps covered a time period extending until roughly 2040, with the end date assumed to be roughly appropriate for initial operation of a multi-TeV e+e– collider. The second day of the workshop comprised talks on synergies between the roadmaps and with global efforts, potential early applications, diagnostics needs, simulation needs, and beam issues and challenges related to a collider. During the last half of the day the roadmaps were revisited but with emphasis on the next five to ten years (as specifically requested in the charge) and on common challenges. The workshop concluded with critical and unanimous endorsement of the individual roadmaps and an extended discussion on the characteristics of the common challenges. (For the agenda and list of participants see Appendix B.)« less