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Fourth generation bound states

Ishiwata, Koji and Wise, Mark B. (2011) Fourth generation bound states. Physical Review D, 83 (7). 074015. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:20110502-112029805

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Abstract

We investigate the spectrum and wave functions of q̅ ′q′ bound states for heavy fourth generation quarks (q′) that have a very small mixing with the three observed generations of standard model quarks. Such bound states come with different color, spin and flavor quantum numbers. Since the fourth generation Yukawa coupling, λ_q′, is large we include all perturbative corrections to the potential between the heavy quark and antiquark of order λ_(q′)^(2)N_c/16π^2 where N_c is the number of colors, as well as relativistic corrections suppressed by (v/c)^2. We find that the lightest fourth generation quark masses for which a bound state exists for color octet states. For the color singlet states, which always have a bound state, we analyze the influence that the Higgs couplings have on the size and binding energy of the bound states.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.83.074015DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.83.074015PublisherUNSPECIFIED
Additional Information:© 2011 American Physical Society. Received 9 March 2011; published 14 April 2011. The work was supported in part by the U.S. Department of Energy under Contract No. DE-FG02-92ER40701, and by the Gordon and Betty Moore Foundation. We are grateful to B. Grinstein for useful discussions.
Group:Caltech Theory, Moore Center for Theoretical Cosmology and Physics
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-92ER40701
Gordon and Betty Moore FoundationUNSPECIFIED
Classification Code:PACS: 14.65.Jk, 12.60.-i
Record Number:CaltechAUTHORS:20110502-112029805
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110502-112029805
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23520
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:03 May 2011 14:38
Last Modified:09 Jan 2015 23:47

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