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Lattice study of the decoupling of heavy fermions

Abstract

According to one-loop perturbation theory, fermions whose masses are totally generated from Yukawa couplings do not decouple in the heavy mass limit. We have investigated this issue nonperturbatively in the strong coupling regime of the chiral U(1) mirror-fermion model in four dimensions. Our numerical results indicate nondecoupling of heavy fermion and mirror-fermion, thus supporting the one-loop picture. We also study this issue in a simpler, but vector-like Z{sub 2} scalar-fermion model. Preliminary results at intermediate and strong Yukawa couplings on 8{sup 4} and 12{sup 4} lattices suggest the nondecoupling of fermions as well. ((orig.)).
Authors:
Lin, L [1] 
  1. National Chung Hsing Univ., Taichung (Taiwan). Dept. of Phys.
Publication Date:
Apr 01, 1995
Product Type:
Journal Article
Report Number:
CONF-9409269-
Reference Number:
SCA: 662110; PA: AIX-26:064401; EDB-95:132481; SN: 95001458415
Resource Relation:
Journal Name: Nuclear Physics B, Proceedings Supplements; Journal Volume: 42; Conference: Lattice `94, Bielefeld (Germany), 25 Sep - 1 Oct 1994; Other Information: PBD: Apr 1995
Subject:
66 PHYSICS; LATTICE FIELD THEORY; FERMIONS; ACTION INTEGRAL; CHIRAL SYMMETRY; CHIRALITY; COMPUTERIZED SIMULATION; COUPLING; DECOUPLING; REST MASS; SCALAR FIELDS; U-1 GROUPS; YUKAWA NONLOCAL THEORY
OSTI ID:
101119
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: NPBSE7; ISSN 0920-5632; TRN: NL95FF448064401
Submitting Site:
NLN
Size:
pp. 627-629
Announcement Date:
Oct 05, 1995

Citation Formats

Lin, L. Lattice study of the decoupling of heavy fermions. Netherlands: N. p., 1995. Web. doi:10.1016/0920-5632(95)00332-4.
Lin, L. Lattice study of the decoupling of heavy fermions. Netherlands. doi:10.1016/0920-5632(95)00332-4.
Lin, L. 1995. "Lattice study of the decoupling of heavy fermions." Netherlands. doi:10.1016/0920-5632(95)00332-4. https://www.osti.gov/servlets/purl/10.1016/0920-5632(95)00332-4.
@misc{etde_101119,
title = {Lattice study of the decoupling of heavy fermions}
author = {Lin, L}
abstractNote = {According to one-loop perturbation theory, fermions whose masses are totally generated from Yukawa couplings do not decouple in the heavy mass limit. We have investigated this issue nonperturbatively in the strong coupling regime of the chiral U(1) mirror-fermion model in four dimensions. Our numerical results indicate nondecoupling of heavy fermion and mirror-fermion, thus supporting the one-loop picture. We also study this issue in a simpler, but vector-like Z{sub 2} scalar-fermion model. Preliminary results at intermediate and strong Yukawa couplings on 8{sup 4} and 12{sup 4} lattices suggest the nondecoupling of fermions as well. ((orig.)).}
doi = {10.1016/0920-5632(95)00332-4}
journal = {Nuclear Physics B, Proceedings Supplements}
volume = {42}
journal type = {AC}
place = {Netherlands}
year = {1995}
month = {Apr}
}