Indications for an anomalous right-handed coupling of the b-quark from a model-independent analysis of LEP and SLD data on Z decays

被引：26

作者：

Field, JH ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Nucl & Corpusculaire, CH-1211 Geneva 4, Switzerland

来源：

MODERN PHYSICS LETTERS A | 1998年 / 13卷 / 24期

关键词：

D O I：

10.1142/S0217732398002059

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A model-independent analysis is made using the LEP and SLD data on Z decays available at the end of 1996. The effective weak coupling constants of leptons, c quarks and b quarks are extracted. Except for the right-handed b-quark coupling, they all agree with the predictions of the standard electroweak model for m(t) = 180 GeV and m(H) = 100 GeV. The right-handed b-quark coupling is found to be 42% and 3.2 standard deviations above the standard model prediction.

引用

页码：1937 / 1954

页数：18

共 25 条

[1]

Abreu P, 1998, EUR PHYS J C, V2, P1

[2]

ABREU P, 1995, Z PHYS C PART FIELDS, V67, P1, DOI 10.1007/BF01564817

[3] Search for the standard model Higgs boson in e(+)e(-) interactions at 161<=root s<=172 GeV [J].

Acciarri, M ;

Adriani, O ;

AguilarBenitez, M ;

Ahlen, S ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alverson, G ;

Alviggi, MG ;

Ambrosi, G ;

Anderhub, H ;

Andreev, VP ;

Angelescu, T ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Baksay, L ;

Banerjee, S ;

Banicz, K ;

Barczyk, A ;

Barillere, R ;

Barone, L ;

Bartalini, P ;

Baschirotto, A ;

Basile, M ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Bhattacharya, S ;

Biasini, M ;

Biland, A ;

Bilei, GM ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Bock, R ;

Bohm, A ;

Boldizsar, L ;

Borgia, B ;

Bourilkov, D .

PHYSICS LETTERS B, 1997, 411 (3-4) :373-386

[4]

Ackerstaff K, 1998, EUR PHYS J C, V1, P425, DOI 10.1007/s100520050094

[5]

ACKERSTAFF K, 1997, CERNPPE97063 OPAL CO

[6]

ALTARELLI EG, Z PHYSICS LEP1, P39

[7]

ALTARELLI EG, Z PHYSICS LEP1, P65

[8] TOWARD A MODEL-INDEPENDENT ANALYSIS OF ELECTROWEAK DATA [J].

ALTARELLI, G ;

BARBIERI, R ;

JADACH, S .

NUCLEAR PHYSICS B, 1992, 369 (1-2) :3-32

[9] VACUUM POLARIZATION EFFECTS OF NEW PHYSICS ON ELECTROWEAK PROCESSES [J].

ALTARELLI, G ;

BARBIERI, R .

PHYSICS LETTERS B, 1991, 253 (1-2) :161-167

[10] NONSTANDARD ANALYSIS OF ELECTROWEAK PRECISION DATA [J].

ALTARELLI, G ;

BARBIERI, R ;

CARAVAGLIOS, F .

NUCLEAR PHYSICS B, 1993, 405 (01) :3-23

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