A Caltech Library Service

Fourth generation bound states

Ishiwata, Koji and Wise, Mark B. (2011) Fourth generation bound states. Physical Review D, 83 (7). 074015. ISSN 2470-0010. doi:10.1103/PhysRevD.83.074015.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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
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
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-92ER40701
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:7
Classification Code:PACS: 14.65.Jk, 12.60.-i
Record Number:CaltechAUTHORS:20110502-112029805
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23520
Deposited On:03 May 2011 14:38
Last Modified:09 Nov 2021 16:15

Repository Staff Only: item control page