Advances in High Energy Physics

Very Heavy Quarks at the LHC


Publishing date
09 Nov 2012
Status
Published
Submission deadline
22 Jun 2012

1Department of Physics, National Taiwan University, Taipei 10617, Taiwan

2Theoretical Physics Department, Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA

3University of Pittsburgh, Pittsburgh, PA 15260, USA


Very Heavy Quarks at the LHC

Description

The ATLAS and CMS experiments have each collected ∼5 fb–1 data with the 7 TeV run of LHC in 2011. With the shutdown of the Tevatron, we have entered a new phase in our quest for the Terascale. However, there is no sign of “New Physics”: supersymmetry is in retreat, and physics beyond the Standard Model seem to lie above the TeV scale. The Higgs boson could still be light, but it could well be rather heavy, which would imply a strongly interacting electroweak sector.

It should be kept in mind that the LHC collides together quarks and gluons, hence it is the preeminent machine for the discovery of new very heavy quarks, which would complement charm, bottom, and top quarks, all discovered at hadronic machines. Although proclaimed to be “in deep trouble,” a sequential 4th quark generation, t′ and b′, is in fact vigorously being pursued at the LHC. The current limits are already at the unitarity bound. If such heavy quarks emerge, their strongly interacting nature could echo the strongly interacting weak sector. But a new question emerges: would the phenomenology, hence search strategy, change?

Also related to electroweak symmetry breaking (EWSB), but in a different way, the so-called top partners could exist to compensate the quadratic correction to the Higgs mass due to the top quark. As such, their masses should not extend too far into the TeV range. Since the masses of such vector-like quarks do not arise from the Higgs mechanism, a chief signature is flavor changing neutral currents. Already, the CMS experiment has made a first search for T → tZ decays.

Besides the search for new heavy quarks, other aspects in relation to EWSB should be explored, such as nonperturbative treatments, co-relation with heavy Higgs, and whether the accompanying lepton sector could be probed at the LHC, as well as flavor physics.

The LHC would continue to take data in 2012, and after the 2013-2014 shutdown, resume with 14 TeV running. To both aid the search studies with 2011-2012 data, and to anticipate the 14 TeV future, it is useful to collect thoughts and efforts on the phenomenology as well as experimental knowledge. We invite authors to contribute original as well as review articles for a special dedicated volume along these lines. Potential topics include, but are not limited to:

  • Fourth generation (sequential chiral) quarks
  • Extra vector-like quarks
  • Flavor physics and extra heavy quarks
  • Heavy Higgs boson(s), electroweak symmetry breaking, and extra heavy quarks
  • Heavy lepton sector in LHC era

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/ahep/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable:


Articles

  • Special Issue
  • - Volume 2013
  • - Article ID 573631
  • - Editorial

Very Heavy Quarks at the LHC

Johan Alwall | Kai-Feng Chen | ... | George Wei-Shu Hou
  • Special Issue
  • - Volume 2013
  • - Article ID 359302
  • - Research Article

Dynamical Electroweak Symmetry Breaking with a Heavy Fermion in Light of Recent LHC Results

Pham Q. Hung
  • Special Issue
  • - Volume 2013
  • - Article ID 672972
  • - Review Article

Two Higgs Doublets, a 4th Generation and a 125 GeV Higgs: A Review

Shaouly Bar-Shalom | Michael Geller | ... | Amarjit Soni
  • Special Issue
  • - Volume 2013
  • - Article ID 690254
  • - Review Article

Long-Lived Heavy Quarks: A Review

Mathieu Buchkremer | Alexander Schmidt
  • Special Issue
  • - Volume 2013
  • - Article ID 875612
  • - Review Article

Higgs-Yukawa Model in Chirally Invariant Lattice Field Theory

John Bulava | Philipp Gerhold | ... | Kenji Ogawa
  • Special Issue
  • - Volume 2013
  • - Article ID 650617
  • - Research Article

Bootstrap Dynamical Symmetry Breaking

Wei-Shu Hou
  • Special Issue
  • - Volume 2013
  • - Article ID 364936
  • - Research Article

LHC Signatures of Vector-Like Quarks

Yasuhiro Okada | Luca Panizzi
  • Special Issue
  • - Volume 2013
  • - Article ID 915897
  • - Review Article

Heavy Chiral Fermions and Dark Matter

Johan Alwall | Jusak Tandean
  • Special Issue
  • - Volume 2013
  • - Article ID 789158
  • - Review Article

Yukawa Bound States and Their LHC Phenomenology

Enkhbat Tsedenbaljir
  • Special Issue
  • - Volume 2013
  • - Article ID 910275
  • - Review Article

Constraints on a Fourth Generation of Fermions from Higgs Boson Searches

Alexander Lenz
Advances in High Energy Physics
 Journal metrics
See full report
Acceptance rate36%
Submission to final decision101 days
Acceptance to publication30 days
CiteScore3.400
Journal Citation Indicator0.360
Impact Factor1.771
 Submit

Article of the Year Award: Outstanding research contributions of 2021, as selected by our Chief Editors. Read the winning articles.