Fermilab   -   Theoretical Physics Department 


New Phenomena Group



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The Fermilab New Phenomena Group meets on Wednesdays at 2:30pm, in the Theory Conference room (third floor of Wilson Hall, East side). The meetings are very informal, with a flexible format. Blackboard presentations are strongly preferred over laptop ones. The topics are announced here, usually a day in advance.

Next meeting: November 26, 2008
Paddy Fox and Yang Bai -- explanations for the PAMELA, ATIC and other results (see 0811.0399 and 0811.0387 ).

Recent meetings:

  • Paolo Giromini (Frascati & CDF) - CDF multimuon analysis - talk
  • Paramita Dey (Harish-Chandra Research Institute) - Two-loop neutrino masses in supersymmetric models with large R-parity violating interactions.
  • Jose Miguel No (IFT Madrid) - Electroweak Phase Transition in Extensions of the Standard Model.
  • Seth Quackenbush (Wisconsin) - Z-prime couplings

    Old meetings:

  • Yang Bai (Yale) - SU(3) family gauge symmetry (e.g., see hep-ph/0603104)
  • Raghvendra Srikanth (HRI) - Neutrino mixing from R-parity violation (e.g., see hep-ph/0605109)
  • Aaron Chou - PVLAS and other laser experiments (see hep-ex/0507107)
  • Spin-dependent long-range forces (see hep-ph/0605342)
  • Bruce Knuteson (MIT) - Priorities for experimental searches.
  • Neal Weiner (NYU) - nonstandard Higgs decays
  • Nausheen Shah (Univ. of Chicago) - Gravitons and Dark Matter in Universal Extra Dimensions
  • Arvind Rajaraman (UC Irvine) - SuperWIMP Dark Matter

    Spring/Summer 2006 meetings:

  • Jing Shu (University of Chicago) - Baryogenesis from an early time phase transition
  • Jose Santiago - Custodial symmetries in RS models.
  • Gustavo Burdman - Signals of a flavor theory in a warped extra dimension.
  • Sin Kyu Kang (Seoul National University) - Flavored leptogenesis and leptonic CP violation.
  • Csaba Balasz - Light summer fun: Cosmological constant problem, vacuum energy problem and counting the quantum states of black holes
  • Jay Hubisz - something interesting.

    Winter 2006 meetings:

  • Causality, analyticity and all that (see hep-th/0602178) -- Richard Hill
  • Top-quark properties in little Higgs models (see hep-ph/0512053) -- Frank Petriello
  • Comparison of two lopsided SO(10) models (see hep-ph/0502161 and hep-ph/0510353) -- Carl Albright.

    Fall 2005 meetings:

  • Geometry in particle physics -- Brent Nelson
  • Lepton flavor violation in warped extra dimensions -- Andrew Blechman
  • Triplet Higgs fields and electroweak fits -- Mu-Chun Chen (see hep-ph/0504286).
  • Embedding the type II (triplet) seesaw model in higher-level string constructions (see hep-ph/0507063, hep-th/0502032).
  • O(25) questions for string theorists -- Joe Lykken (see hep-th/0509157).
  • Neutrino Majorana phases and charged-lepton electric dipole moments Shri Gopalakrishna (see hep-ph/0508148).
  • Kaluza-Klein dark matter -- Dan Hooper (see hep-ph/0509119 and hep-ph/0509118).
  • Off-the-Wall Higgs in the Universal RS Model -- Ben Lillie (see hep-ph/0508279).

    Summer 2005 meetings:

  • Topology in gauge theory -- Chris Hill
  • Modified gravity -- Olga Mena and Jose Santiago (see astro-ph/0410031 and astro-ph/0410031).

    Spring 2005 meetings:

  • Gravity on the lattice -- Jack Laiho (see hep-th/0505154).
  • Flavor symmetries -- Liliana Velasco-Sevilla (see hep-ph/0504038, hep-ph/0401064).
  • Seesaw and fermion masses in minimal SO(10) -- Michele Frigerio (see hep-ph/0406117, hep-ph/0210207, hep-ph/0303055, hep-ph/0504241, hep-ph/0505200)
  • Cosmic superstrings - Mark Jackson (see hep-th/0405229).
  • T symmetry (hep-ph/0308199, hep-ph/0405243)

    Winter 2005 meetings:

  • Spin-dependent long-range forces
  • Top seesaw versus little Higgs
  • Seesaw energy scale and the LSND anomaly (see hep-ph/0501039 ) -- Andre de Gouvea
  • Long-lived gluinos at the LHC (hep-ph/0408088) -- Tilman Plehn
  • Gluinonium at the LHC (hep-ph/0408335) -- Way-Yee Keung
  • Leptogenesis with Majorana Neutrinos (see for example hep-ph/0308261) -- Manny Paschos

    Fall 2004 meetings:

  • Energy scales in a stabilized brane world (hep-th/9909134)
  • Neutrinos and dark energy
    (hep-ph/0411137, astro-ph/0309800, hep-ph/0401099 )
  • String resonances at hadron colliders (hep-ph/0411094)
  • Explorations of Little Higgs
  • Brane Kinetic Terms (hep-th/0302023)
  • What's new in Universal Extra Dimensions
  • Higgs measurements at the ILC
  • Warped Unification, Proton Stability and Dark Matter (hep-ph/0403143)
  • Seesaw induced electroweak scale? (hep-ph/0408191, hep-ph/0206091).

    Spring/summer 2004 meetings:

  • Soft-collinear effective theory (hep-ph/0011336, ...)
  • Electroweak Supersymmetry with an Approximate U(1)_PQ (see hep-ph/0405109, hep-ph/0405109, hep-ph/0008192)
  • Relaxing the generational universality of mSUGRA, hep-ph/0403214
  • Narrow Z' (hep-ph/0403288)
  • Viable Supersymmetry and Leptogenesis with Anomaly Mediation: hep-ph/0403198

    Winter 2004 meetings:

  • Gravitational baryogenesis and more (see hep-ph/0403019, hep-th/0403069).
  • Properties of dark matter
  • Bounds on new light degrees of freedom from primordial nucleosynthesis
  • Conifolds (hep-ph/0306049)
  • Kaluza Klein Bound States (hep-ph/0312055)

    Fall 2003 meetings:

  • New models of electroweak symmetry breaking (see for example hep-ph/0306259, hep-ph/0311349, hep-ph/0307293, hep-ph/0305237)
  • Higgsless Electroweak Symmetry Breaking from a warped extra dimension. (hep-ph/0308038, hep-ph/0309189, hep-ph/0310285, hep-ph/0310355 )
  • Mass varying neutrinos (astro-ph/0309800)
  • Light gluinos
  • Spontaneous versus explicit CP violation

    Summer 2003 meetings:

  • Neutrino masses from R-parity violation
  • Ward Identities and High Energy Behavior of the SM
  • Graviton Cosmology in Universal Extra Dimensions (see hep-ph/0307375).
  • Mass bound on the Higgs boson(s) in the supersymmetric standard Model.
  • Large isospin violation from warped extra dimensions (see hep-ph/0203091).
  • Brane Gauge Fields (see hep-th/0209142).
  • Higgs as a hologram (see hep-ph/0306259 ).
  • How to probe the origin of electroweak symmetry breaking (see for example hep-ph/0302141).
  • Linear collider: Physics Oportunities and strategies beyond the LHC complementarity
  • On the Possibility of Large Axion Decay Constants (hep-th/0303252).

    Spring 2003 meetings:

  • Gauge Theories on an Interval: Unitarity without a Higgs (hep-ph/0305237).
  • Precision Electroweak Data and Unification of Couplings in Warped Extra Dimensions (hep-ph/0305188).
  • Number of generations from a gauge SU(3) symmetry, hep-ph/0304256.
  • A new narrow resonance at 2.32 GeV ! (see the experimental result hep-ex/0304021, and some theoretical papers).
  • Geometrical renormalization groups (see hep-th/0303267).
  • Super-WIMPs (see hep-ph/0302215)
  • Unitarity of the Standard Model in extra dimensions (see hep-ph/0302263)
  • Extranatural Inflation (see hep-th/0301218, hep-th/0302034 )
  • The SU(3)xSU(4)xU(1) model (hep-ph/0302049)
  • Summary of the Aspen Winter Conference.
  • Genuine dimension-six Higgs operators: hep-ph/0301097.

    Fall 2002 meetings:

  • "Round" table discussion of the Run II discovery potential.
  • Massive spin-2 fields (see hep-th/0210184, hep-th/0209227, ...)
  • Implications of the KamLAND result on theories beyond the standard model.
  • Conversation about quark and lepton masses
  • Signatures of the Radion (see hep-ph/0210254 and references therein.)
  • CPT violation (see hep-ph/0210411) and other non-standard neutrino effects.
  • impact of the neutrino oscillation data on what we know about physics beyond the Standard Model.
  • impact of the neutrino oscillation data on what we know about physics beyond the Standard Model.
  • Event generators for new physics (see Steve Mrenna's page.)
  • How supersymmetry breaking may be communicated to the Standard Model fields, and how extra dimensions may help the mediation of supersymmetry breaking (some comments and links).
  • Higgs doublet as a Nambu-Goldstone boson (some papers).

    Future meetings:

  • Please send proposals to: bdob@fnal.gov

  •                 Beyond the Standard Model                

    Our present understanding of the structure of matter at its most microscopic level is in terms of the so-called standard model of strong, weak and electromagnetic interactions. The model prescribes that all matter is built out of some fermions (called quarks and leptons) that interact with spin-1 fields (gluons, W, Z, and photon) which are manifestations of gauge symmetries.

    In spite of the success that the model has had in accounting for phenomena that can be probed at the energies available with current accelerators, it is nevertheless considered incomplete for a variety of reasons. The model has too many unexplained, arbitrary parameters, such as the masses of the fermions, which take on a perplexing variety of values. In fact, mass generation appears to indicate that some new physics must manifest itself at or below energies of order 1 TeV. The model also does not include dark matter or take gravity into account.

    The particle theorists working on physics beyond the standard model investigate various aspects related to these considerations, some leading to direct experimental consequences and others providing deeper insights into the underlying theoretical and mathematical structures, with possible connections to other areas of physics.

    Subjects of particular interest include:
  • extra spatial dimensions (some studies)
  • supersymmetry (some studies, and a review)
  • electroweak symmentry breaking (some studies)
  • ...

  • Klein bottles - a possible compactification
    of two extra dimensions

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                    Physics Resources                

  • e-Print Archivehep-ph (new, recent) ,  hep-th  (new, recent) ,  hep-ex (new, recent)  

  • Spires HEP databaseParticle Data GroupNeutrinos, Durham RAL Databases.

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    Theory Division.

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  • Brookhaven, DESY, KEK, Los Alamos;

  • Physics Departments, Universities, U.S. Higher Education.

  • HEP organizations, DOE, Division of High Energy Physics;   NSF, Division of Physics;  

  • HEPIC, HEP Virtual Phonebook; Aspen;

  • Journals: Phys. Rev. D, Phys. Rev. Lett., Nuclear Physics B, Physics Letters, JHEP.
  • Info on physics in extra dimensions.
  • Books: Cheng & Li, Georgi, Quigg, Peskin & Schroeder
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                    Particle Physics for Everyone

        Basics facts about Particle Physics, thanks to Fermilab.
        The Particle Adventure by the Particle Data Group.
        The Visitor Center at SLAC.
        Physics tutorial from CERN.

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    Send comments to Bogdan Dobrescu: bdob@fnal.gov