SOME CONSTRAINTS ON NEUTRAL HEAVY-LEPTONS FROM FLAVOR-CONSERVING DECAYS OF THE Z-BOSON

被引：20

作者：

BHATTACHARYA, G

KALYNIAK, P

MELO, I

机构：

[1] Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ont. K1S 5B6

来源：

PHYSICAL REVIEW D | 1995年 / 51卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.51.3569

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Small neutrino masses can arise in some grand unified models or superstring theories. We consider a model with an enhanced fermion sector containing Dirac neutral heavy leptons. The dependence on the mass and mixing parameters of these new fermions is investigated for several measurable quantities. We study the flavor-conserving leptonic decays of the Z boson and universality breaking in these decays. We also consider the W boson mass dependence on neutral heavy lepton parameters. © 1995 The American Physical Society.

引用

页码：3569 / 3577

页数：9

共 28 条

[1] INFRARED SINGULARITIES AND MASSIVE FIELDS [J].

APPELQUIST, T ;

CARAZZONE, J .

PHYSICAL REVIEW D, 1975, 11 (10) :2856-2861

[2] LEPTON FLAVOR NONCONSERVATION AT HIGH-ENERGIES IN A SUPERSTRING INSPIRED STANDARD MODEL [J].

BERNABEU, J ;

SANTAMARIA, A ;

VIDAL, J ;

MENDEZ, A ;

VALLE, JWF .

PHYSICS LETTERS B, 1987, 187 (3-4) :303-308

[3] TOP QUARK MASS FROM RADIATIVE-CORRECTIONS TO THE Z-]BBBAR DECAY [J].

BERNABEU, J ;

PICH, A ;

SANTAMARIA, A .

NUCLEAR PHYSICS B, 1991, 363 (2-3) :326-344

[4] UNIVERSALITY-BREAKING EFFECTS IN LEPTONIC Z-DECAYS [J].

BERNABEU, J ;

KORNER, JG ;

PILAFTSIS, A ;

SCHILCHER, K .

PHYSICAL REVIEW LETTERS, 1993, 71 (17) :2695-2698

[5]

CARNEGIE R, COMMUNICATION

[6] PHENOMENOLOGICAL CONSEQUENCES OF SINGLET NEUTRINOS [J].

CHANG, LN ;

NG, D ;

NG, JN .

PHYSICAL REVIEW D, 1994, 50 (07) :4589-4601

[7]

DITTMAR M, 1989, NUCL PHYS B, V332, P1

[8]

FENG Z, 1994, 8TH ANN M AM PHYS S

[9]

Gell-Mann M., 1979, Supergravity, P315

[10] ISOSINGLET-NEUTRAL HEAVY-LEPTON PRODUCTION IN Z-DECAYS AND NEUTRINO MASS [J].

GONZALEZGARCIA, MC ;

SANTAMARIA, A ;

VALLE, JWF .

NUCLEAR PHYSICS B, 1990, 342 (01) :108-126

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