E4-B:  Hadron Benchmarks Working Group

a sub-group of

wgE4: Hadron-Hadron & Lepton-Hadron Colliders

in preparation for Snowmass 2001

Schedule of Talks:



Work under the assumption that a VLHC will be only interesting if it is capable of a minimum enhancement over LHC for most SM and BSM reactions. Select a set of BSM and SM reactions and determine what enhancement factors of LHC-decade event samples would be required in order to create acceptably large total samples (VS) which would minimally justify the VLHC. Calculate instantaneous luminosities which would be required at representative CM energies in order to match the VS sizes.


Work Needed:

Expected Sensitivities:

For the following, we would just find the expected sensitivities for LHC and VLHC. A detailed list compiled by Ashutosh Kotwal. (txt)

Cross Section Benchmarks compiled by Ashutosh Kotwal. (xls)

Meeting Minutes:

Reports and Presentations:      (Any contribution to these or related projects is welcome)

To stimulate discussion and brainstorming, we list some references here that may be useful to serve as starting points:
  • 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

  • References and Notes:          (To be updated)

  • more ideas here


    Working Group Members, Friends, and Associates:

    (In no particular order)

    Ashutosh Kotwal     kotwal@phy.duke.edu
    Fred Olness          olness@mail.smu.edu

    Join our mailing list:

    Send an E-mail to:  Ashutosh Kotwal


    This page is maintained by Fred Olness.

    You can reach me by e-mail: olness@mail.physics.smu.edu, phone (214) 768-2500, or fax: (214) 768-4095.