a sub-group of
Hadron-Hadron & Lepton-Hadron Colliders
in preparation for Snowmass 2001
Cross Section Benchmarks compiled
by Ashutosh Kotwal. (xls)
Viable Supersymmetric Models with an Inverted Scalar Mass Hierarchy at the GUT Scale
Howard Baer, Csaba Balazs, Pedro Mercadante, Xerxes Tata, Yili Wang
Supersymmetric models with an inverted mass hierarchy (IMH: multi-TeV first and second generation matter scalars, and sub-TeV third generation and Higgs scalars) have been proposed to ameliorate phenomenological problems arising from flavor changing neutral currents (FCNCs) and CP violating processes, while satisfying conditions of naturalness. Models with an IMH already in place at the GUT scale have been shown to be constrained in that for many model parameter choices, the top squark squared mass is driven to negative values. We delineate regions of parameter space where viable models with a GUT scale IMH can be generated. We find that larger values of GUT scale first and second generation scalar masses act to suppress third generation scalars, leading to acceptable solutions if GUT scale gaugino masses are large enough. We show examples of viable models and comment on their characteristic features. For example, in these models the gluino mass is bounded from below, and effectively decouples, whilst third generation scalars remain at sub-TeV levels. While possibly fulfilling criteria of naturalness, these models present challenges for detection at future pp and e^+e^- collider experiments.
Summary of the Very Large Hadron Collider Physics and Detector Workshop
G. Anderson, U. Baur, M. Berger, F. Borcherding, A. Brandt, D. Denisov (Co-Chair and Co-editor), S. Eno, T. Han, S. Keller (Co-Chair and Co-editor), D. Khazins, T. LeCompte, J. Lykken, F. Olness, F. Paige, R. Scalise, E. H. Simmons, G. Snow, C. Taylor, J. Womersley Report-no: FERMILAB-CONF-97/ 318-T
One of the options for an accelerator beyond the LHC is a hadron collider with higher energy. Work is going on to explore accelerator technologies that would make such a machine feasible. This workshop concentrated on the physics and detector issues associated with a hadron collider with an energy in the center of mass of the order of 100 to 200 TeV.
Discovery Potential for New Phenomena
Stephen Godfrey, JoAnne L. Hewett, Lawrence E. Price.
We examine the ability of future facilities to discover and interpret non-supersymmetric new phenomena. We first explore explicit manifestations of new physics, including extended gauge sectors, leptoquarks, exotic fermions, and technicolor models. We then take a more general approach where new physics only reveals itself through the existence of effective interactions at lower energy scales.
[Summary Report of the New Phenomena Working Group. To appear in the Proceedings of the 1996 DPF/DPB Summer Study on New Directions for High Energy Physics - Snowmass96, Snowmass, CO, 25 June - 12 July 1996.] Presented at 1996 DPF / DPB Summer Study on New Directions for High-Energy Physics (Snowmass 96), Snowmass, CO, 25 Jun - 12 Jul 1996. e-Print Archive: hep-ph/9704291
ATLAS Detector and Physics Performance Technical Design Report
The Atlas Collaboration
A comprehensive compilation of LHC physics at ATLAS.
Design Study for a Staged Very Large Hadron Collider (941K, 49 pages, PDF Format)
Presentation by P. Limon, 17 May 2001.
www.vlhc.org M4 - Working Group on Hadron Colliders Snowmass 2001 VLHC Design Study Fermilab TM-2149 (Preliminary DRAFT 5/18/01) Physics Needs for Future Accelerators
Article by Joe Lykken: hep-ph/0001319
Talk given at 19th International Symposium on Lepton and Photon Interactions at High-Energies (LP 99), Stanford, California, 9-14 Aug 1999.
Physics in ATLAS at a possible upgraded LHC
(295K, 16 pages, PDF Format)
Atlas on potential for physics at an upgraded LHC
Physics at 100-200 TeV
(118K, 12 pages, ps.gv Format)
Tao Han (UW-Madison) 1999 VLHC meeting.
Physics at the VLHC
(378K, 35 pages, PDF Format)
Ulrich Baur, State University of New York at Buffalo
HEPAP subpanel 06/11/01
Physics with 12 Tesla Magnet Hadron Collider
(2.1M, 36 pages, PDF Format)
Teruki Kamon, Texas A&M University
Working Group Presentations: See the main group page at: wgE4: Hadron-Hadron & Lepton-Hadron Colliders Ashutosh Kotwal (xx July 2001) Fred Olness (xx July 2001) Your name here
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