Weak-triplet, color-octet scalars and the CDF dijet excess

Dobrescu, Bogdan A.; Krnjaic, Gordan Z.

doi:10.1103/PhysRevD.85.075020

Title: Weak-triplet, color-octet scalars and the CDF dijet excess

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Abstract

We extend the standard model to include a weak-triplet and color-octet scalar. This 'octo-triplet' field consists of three particles, two charged and one neutral, whose masses and renormalizable interactions depend only on two new parameters. The charged octo-triplet decay into a W boson and a gluon is suppressed by a loop factor and an accidental cancellation. Thus, the main decays of the charged octo-triplet may occur through higher-dimensional operators, mediated by a heavy vectorlike fermion, into quark pairs. For an octo-triplet mass below the tb¯ threshold, the decay into Wb b¯ through an off-shell top quark has a width comparable to that into cs¯ or cb¯. Pair production with one octo-triplet decaying to two jets and the other decaying to a W and two soft b jets may explain the dijet-plus-W excess reported by the CDF Collaboration. The same higher-dimensional operators lead to CP violation in B_s-B¯_s mixing.

Authors:

Dobrescu, Bogdan A. ^[1]; Krnjaic, Gordan Z. ^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Dept.
Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy

Publication Date:: Tue Apr 24 00:00:00 EDT 2012

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1012423

Alternate Identifier(s):: OSTI ID: 1098797

Report Number(s):: FERMILAB-PUB-11-141-T
Journal ID: ISSN 1550-7998 ; arXiv eprint number arXiv:1104.2893; TRN: US1102279

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 85; Journal Issue: 7; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS, 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CANCELLATION; DECAY; FERMILAB COLLIDER DETECTOR; GLUONS; INTERMEDIATE BOSONS; PAIR PRODUCTION; QUARKS; SCALARS; STANDARD MODEL; T QUARKS; Experiment-HEP, Phenomenology-HEP

Citation Formats


                    Dobrescu, Bogdan A., and Krnjaic, Gordan Z. Weak-triplet, color-octet scalars and the CDF dijet excess.  United States: N. p., 2012. 
Web.  doi:10.1103/PhysRevD.85.075020.

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                    Dobrescu, Bogdan A., & Krnjaic, Gordan Z. Weak-triplet, color-octet scalars and the CDF dijet excess.  United States.  https://doi.org/10.1103/PhysRevD.85.075020

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                    Dobrescu, Bogdan A., and Krnjaic, Gordan Z. Tue .  
"Weak-triplet, color-octet scalars and the CDF dijet excess".  United States.  https://doi.org/10.1103/PhysRevD.85.075020.  https://www.osti.gov/servlets/purl/1012423.

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@article{osti_1012423,

  title        = {Weak-triplet, color-octet scalars and the CDF dijet excess},

  author       = {Dobrescu, Bogdan A. and Krnjaic, Gordan Z.},

  abstractNote = {We extend the standard model to include a weak-triplet and color-octet scalar. This 'octo-triplet' field consists of three particles, two charged and one neutral, whose masses and renormalizable interactions depend only on two new parameters. The charged octo-triplet decay into a W boson and a gluon is suppressed by a loop factor and an accidental cancellation. Thus, the main decays of the charged octo-triplet may occur through higher-dimensional operators, mediated by a heavy vectorlike fermion, into quark pairs. For an octo-triplet mass below the tb¯ threshold, the decay into Wb b¯ through an off-shell top quark has a width comparable to that into cs¯ or cb¯. Pair production with one octo-triplet decaying to two jets and the other decaying to a W and two soft b jets may explain the dijet-plus-W excess reported by the CDF Collaboration. The same higher-dimensional operators lead to CP violation in Bs-B¯s mixing.},

  doi          = {10.1103/PhysRevD.85.075020},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 7,

  volume       = 85,

  place        = {United States},

  year         = {Tue Apr 24 00:00:00 EDT 2012},

  month        = {Tue Apr 24 00:00:00 EDT 2012}

}

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