[Show abstract][Hide abstract] ABSTRACT: This paper describes the physics case for a new fixed target facility at CERN
SPS. The SHiP (Search for Hidden Particles) experiment is intended to hunt for
new physics in the largely unexplored domain of very weakly interacting
particles with masses below the Fermi scale, inaccessible to the LHC
experiments, and to study tau neutrino physics. The same proton beam setup can
be used later to look for decays of tau-leptons with lepton flavour number
non-conservation, $\tau\to 3\mu$ and to search for weakly-interacting sub-GeV
dark matter candidates. We discuss the evidence for physics beyond the Standard
Model and describe interactions between new particles and four different
portals - scalars, vectors, fermions or axion-like particles. We discuss
motivations for different models, manifesting themselves via these
interactions, and how they can be probed with the SHiP experiment and present
several case studies. The prospects to search for relatively light SUSY and
composite particles at SHiP are also discussed. We demonstrate that the SHiP
experiment has a unique potential to discover new physics and can directly
probe a number of solutions of beyond the Standard Model puzzles, such as
neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation
[Show abstract][Hide abstract] ABSTRACT: d) Horia Hulubei National Institute of RD for Physics and Nuclear Engineering, IFIN-HH, 407 Atomistilor Street, R-077125, Magurele, jud. ILFOV, PO Box MG-6, postal code RO-077125, Romania (e) ETH Zurich, 101 Raemistrasse, CH-8092 Zurich (f) The University of Sheffield (USFD), New Spring House 231, Glossop Road, Sheffield S102GW, United Kingdom (g) Lombardi Engineering Limited, via R.Simen, CH-6648, Minusio (h) Commissariat à l'Energie Atomique (CEA)/ Direction des Sciences de la Matière, 25 rue Leblanc, Paris 75015, France (i) Laboratorio Subterraneo de Canfranc (LSC), Plaza del Ayuntamiento no. 1, 22880 Canfranc (Huesca), Spain (j) Mineral and Energy Economy Research Institute of the Polish Academy of Sciences (IGSMIE-PAN), Wybickiego 7, 30-950 Krakow, Poland (k) Wroclaw University of Technology (PWr Wroclaw), ul. Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland (l) University of Bucarest (UoB), Faculty of Physics Bld.Atomistilor nr.405, Physics Platform, Magurele, Ilfov County, RO-077125, MG-11 Bucharest-Magurele, Romania (m) University of Oulu (U-OULU), 1 Pentti Kaiteran Katu, Oulu 90014, Finland (n) Technische Universität München (TUM), 21 Arcisstrasse, München 80333, Germany (o) University of Aarhus (AU), 1 Norde Ringgade, Aarhus C 8000, Denmark (p) AGT Ingegneria Srl, Perugia, 10 A via della Pallotta, Perugia 06126, Italy (q) Technodyne International Ltd., Unit16, Shakespeare Business Centre Hathaway Close, Eastleigh UK SO 50 4SR, United Kingdom (r) Kalliosuunnittelu Oy Rockplan Ltd., 2 Asemamiehenkatu, Helsinki 00520, Finland (s) University of Jyväskylä (JyU), 9 Survontie, Jyväskylä 40014, Finland (t) Cleveland Potash Limited (CPL), Boulby Mine, Loftus, Saltburn Cleveland, TS13 4UZ, UK (u) Institute of Physics, University of Silesia Uniwersytecka 4, 40-007 Katowice, Poland (v) Universidad Autonoma de Madrid (UAM), C/Einstein no. 1; Rectorado, Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain (w) Max-Planck-Institute for Nuclear Physics, Heidelberg (x) KGHM CUPRUM Ltd Research and Development Centre, Pl. 1 Maja, 50-136 Wrocaw, Poland (y) IFJ Pan, H.Niewodniczaski Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Krakow, Poland (z) Max-Planck-Institute for Physics, Munich (A) High Energy Physics Department -A. Soltan Institute * Contribution to the Workshop "European Strategy for Future Neutrino Physics", CERN, Oct. 2009, to appear in the Proceedings.
[Show abstract][Hide abstract] ABSTRACT: The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study. To accommodate giant neutrino detectors and shield them from cosmic rays, a new very large underground infrastructure is required. Seven potential candidate sites in different parts of Europe and at several distances from CERN are being studied: Boulby (UK), Canfranc (Spain), Fr\'ejus (France/Italy), Pyh\"asalmi (Finland), Polkowice-Sieroszowice (Poland), Slanic (Romania) and Umbria (Italy). The design study aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010. Comment: 5 pages, contribution to the Workshop "European Strategy for Future Neutrino Physics", CERN, Oct. 2009
[Show abstract][Hide abstract] ABSTRACT: The conclusions of the Physics Working Group of the International Scoping Study of a future Neutrino Factory and super-beam facility (the ISS) are presented. The ISS was carried out by the international community between NuFact05, (the 7th International Workshop on Neutrino Factories and Super-beams, Laboratori Nazionali di Frascati, Rome, 21–26 June 2005) and NuFact06 (Ivine, CA, 24–30 August 2006). The physics case for an extensive experimental programme to understand the properties of the neutrino is presented and the role of high-precision measurements of neutrino oscillations within this programme is discussed in detail. The performance of second-generation super-beam experiments, beta-beam facilities and the Neutrino Factory are evaluated and a quantitative comparison of the discovery potential of the three classes of facility is presented. High-precision studies of the properties of the muon are complementary to the study of neutrino oscillations. The Neutrino Factory has the potential to provide extremely intense muon beams and the physics potential of such beams is discussed in the final section of the report.
Reports on Progress in Physics 09/2009; 72(10):106201. DOI:10.1088/0034-4885/72/10/106201 · 17.06 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This chapter of the report of the ``Flavor in the era of the LHC'' Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector and in flavor conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavor structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the standard model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
European Physical Journal C 08/2008; 57(1-2). DOI:10.1140/epjc/s10052-008-0715-2 · 5.08 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: We investigate the flavour structure of generic extensions of the SM where quark and lepton mass hierarchies and the suppression of flavour-changing transitions originate only by the normalization constants of the fermion kinetic terms. We show that in such scenarios the contributions to quark FCNC transitions from dimension-six effective operators are sufficiently suppressed without (or with modest) fine tuning in the effective scale of new physics. The most serious challenge to this type of scenarios appears in the lepton sector, thanks to the stringent bounds on LFV. The phenomenological consequences of this scenarios in view of improved experimental data on quark and lepton FCNC transitions, and its differences with respect to the Minimal Flavour Violation hypothesis are also discussed.
Physics Letters B 05/2008; 663(1-2-663):73-79. DOI:10.1016/j.physletb.2008.04.005 · 6.13 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This chapter of the report of the ``Flavour in the era of the LHC'' Workshop discusses the theoretical, phenomenological and experimental issues related to flavour phenomena in the charged lepton sector and in flavour-conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavour structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the Standard Model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
[Show abstract][Hide abstract] ABSTRACT: We consider models where one Majorana neutrino is massless at tree level (like the see-saw with two right-handed neutrinos), and compute the contribution to its mass m generated by two-loop quantum corrections. The result is m∼10−13 eV in the SM and m∼10−10 eV⋅4(tanβ/10) in the MSSM, compatible with the restricted range suggested by Affleck–Dine baryogenesis.
Physics Letters B 03/2007; 646(2-3-646):100-104. DOI:10.1016/j.physletb.2007.01.015 · 6.13 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: After a brief overview of the present knowledge of neutrino masses and mixing, we summarize what can be learned about physics beyond the standard model from the various proposed neutrino experiments. We also comment on the impact of the experiments on our understanding of the origin of the matter-antimatter asymmetry of the Universe as well as what can be learned from some experiments outside the domain of neutrinos.