Revisiting the global electroweak fit of the Standard Model and beyond with Gfitter

被引：142

作者：

Flaecher, H. ^{[1
]}

Goebel, M. ^{[2
,3
,4
]}

Haller, J. ^{[4
]}

Hoecker, A. ^{[1
]}

Moenig, K. ^{[2
,3
]}

Stelzer, J. ^{[2
,3
]}

机构：

[1] CERN, Geneva, Switzerland

[2] DESY, D-2000 Hamburg, Germany

[3] DESY, Zeuthen, Germany

[4] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 60卷 / 04期

关键词：

FERMION-PAIR PRODUCTION; ONE-LOOP CORRECTIONS; QUANTUM-CHROMODYNAMIC CORRECTIONS; HEAVY TOP CORRECTIONS; MINIMAL-SUBTRACTION; COUPLING-CONSTANT; BETA-FUNCTION; QUARK MASS; SEMIANALYTICAL PROGRAM; PARITY NONCONSERVATION;

D O I：

10.1140/epjc/s10052-009-0966-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The global fit of the Standard Model to electroweak precision data, routinely performed by the LEP electroweak working group and others, demonstrated impressively the predictive power of electroweak unification and quantum loop corrections. We have revisited this fit in view of (i) the development of the new generic fitting package, Gfitter, allowing for flexible and efficient model testing in high-energy physics, (ii) the insertion of constraints from direct Higgs searches at LEP and the Tevatron, and (iii) a more thorough statistical interpretation of the results. Gfitter is a modular fitting toolkit, which features predictive theoretical models as independent plug-ins, and a statistical analysis of the fit results using toy Monte Carlo techniques. The state-of-the-art electroweak Standard Model is fully implemented, as well as generic extensions to it. Theoretical uncertainties are explicitly included in the fit through scale parameters varying within given error ranges. This paper introduces the Gfitter project, and presents state-of-the-art results for the global electroweak fit in the Standard Model (SM), and for a model with an extended Higgs sector (2HDM). Numerical and graphical results for fits with and without including the constraints from the direct Higgs searches at LEP and Tevatron are given. Perspectives for future colliders are analysed and discussed. In the SM fit including the direct Higgs searches, we find M-H = 116.4(-1.3)(+18.3) GeV, and the 2 sigma and 3 sigma allowed regions [ 114, 145] GeV and [[ 113, 168] and [ 180, 225]] GeV, respectively. For the strong coupling strength at fourth perturbative order we obtain alpha(S)(M-Z(2)) = 0.1193(-0.0027)(+0.0028) (exp) +/- 0.0001 (theo). Finally, for the mass of the top quark, excluding the direct measurements, we find m(t) = 178.2(-4.2)(+ 9.8) GeV. In the 2HDM we exclude a charged-Higgs mass below 240 GeV at 95% confidence level. This limit increases towards larger tan beta, e. g., M-H +/- < 780 GeV is excluded for tan beta = 70.

引用

页码：543 / 583

页数：41

共 154 条

[1] NEARBY DOORWAY STATES, PARITY DOUBLETS, AND PARITY MIXING IN COMPOUND NUCLEAR-STATES [J].

AUERBACH, N ;

BOWMAN, JD ;

SPEVAK, V .

PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2638-2641

[2] Combination of CDF and D0 results on the W boson mass and width -: art. no. 092008 [J].

Abazov, VM ;

Abbott, B ;

Abdesselam, A ;

Abolins, M ;

Abramov, V ;

Acharya, BS ;

Acosta, D ;

Adams, DL ;

Adams, M ;

Affolder, T ;

Ahmed, SN ;

Akimoto, H ;

Akopian, A ;

Albrow, MG ;

Alexeev, GD ;

Alton, A ;

Alves, GA ;

Amaral, P ;

Ambrose, D ;

Amendolia, SR ;

Amidei, D ;

Anikeev, K ;

Antos, J ;

Apollinari, G ;

Arnoud, Y ;

Arisawa, T ;

Artikov, A ;

Asakawa, T ;

Avila, C ;

Ashmanskas, W ;

Atac, M ;

Azfar, F ;

Azzi-Bacchetta, P ;

Babintsev, VV ;

Babukhadia, L ;

Bacchetta, N ;

Bachacou, H ;

Bacon, TC ;

Baden, A ;

Badgett, W ;

Baffioni, S ;

Bailey, MW ;

Bailey, S ;

Baldin, B ;

Balm, PW ;

Banerjee, S ;

de Barbaro, P ;

Barbaro-Galtieri, A ;

Barberis, E ;

Baringer, P .

PHYSICAL REVIEW D, 2004, 70 (09) :092008-1

[3] Search for the standard model Higgs boson at LEP [J].

Abbaneo, D ;

Abbiendi, G ;

Barate, R ;

Heister, A ;

Schael, S ;

Barate, R ;

Bruneliere, R ;

De Bonis, I ;

Decamp, D ;

Goy, C ;

Jezequel, S ;

Lees, JP ;

Martin, F ;

Merle, E ;

Minard, MN ;

Pietrzyk, B ;

Trocme, B ;

Boix, G ;

Bravo, S ;

Casado, MP ;

Chmeissani, M ;

Crespo, JM ;

Fernandez, E ;

Fernandez-Bosman, M ;

Garrido, L ;

Grauges, E ;

Lopez, J ;

Martinez, M ;

Merino, G ;

Miquel, R ;

Mir, LM ;

Pacheco, A ;

Paneque, D ;

Ruiz, H ;

Colaleo, A ;

Creanza, D ;

De Filippis, N ;

de Palma, M ;

Iaselli, G ;

Maggi, G ;

Maggi, M ;

Nuzzo, S ;

Ranieri, A ;

Raso, G ;

Ruggieri, F ;

Selvaggi, G ;

Silvestris, L ;

Tempesta, P ;

Tricomi, A ;

Zito, G .

PHYSICS LETTERS B, 2003, 565 (1-4) :61-75

[4] Measurement of the running of the QED coupling in small-angle Bhabha scattering at LEP [J].

Abbiendi, G. ;

Ainsley, C. ;

Akesson, P. F. ;

Alexander, G. ;

Anagnostou, G. ;

Anderson, K. J. ;

Asai, S. ;

Axen, D. ;

Bailey, I. ;

Barberio, E. ;

Barillari, T. ;

Barlow, R. J. ;

Batley, R. J. ;

Bechtle, P. ;

Behnke, T. ;

Bell, K. W. ;

Bell, P. J. ;

Bella, G. ;

Bellerive, A. ;

Benelli, G. ;

Bethke, S. ;

Biebel, O. ;

Boeriu, O. ;

Bock, P. ;

Boutemeur, M. ;

Braibant, S. ;

Brown, R. M. ;

Burckhart, H. J. ;

Campana, S. ;

Capiluppi, P. ;

Carnegie, R. K. ;

Carter, A. A. ;

Carter, J. R. ;

Chang, C. Y. ;

Charlton, D. G. ;

Ciocca, C. ;

Csilling, A. ;

Cuffiani, M. ;

Dado, S. ;

Dallavalle, G. M. ;

De Roeck, A. ;

De Wolf, E. A. ;

Desch, K. ;

Dienes, B. ;

Dubbert, J. ;

Duchovni, E. ;

Duckeck, G. ;

Duerdoth, I. P. ;

Etzion, E. ;

Fabbri, F. .

EUROPEAN PHYSICAL JOURNAL C, 2006, 45 (01) :1-21

[5] Tests of the standard model and constraints on new physics from measurements of fermion-pair production at 189-209 GeV at LEP [J].

Abbiendi, G ;

Ainsley, C ;

Åkesson, PF ;

Alexander, G ;

Allison, J ;

Amaral, P ;

Anagnostou, G ;

Anderson, KJ ;

Arcelli, S ;

Asai, S ;

Axen, D ;

Azuelos, G ;

Bailey, I ;

Barberio, E ;

Barillari, T ;

Barlow, RJ ;

Batley, RJ ;

Bechtle, P ;

Behnke, T ;

Bell, KW ;

Bell, PJ ;

Bella, G ;

Bellerive, A ;

Benelli, G ;

Bethke, S ;

Biebel, O ;

Boeriu, O ;

Bock, P ;

Boutemeur, M ;

Braibant, S ;

Brigliadori, L ;

Brown, RM ;

Buesser, K ;

Burckhart, HJ ;

Campana, S ;

Carnegie, RK ;

Caron, B ;

Carter, AA ;

Carter, JR ;

Chang, CY ;

Charlton, DG ;

Ciocca, C ;

Csilling, A ;

Cuffiani, M ;

Dado, S ;

De Roeck, A ;

De Wolf, EA ;

Desch, K ;

Dienes, B ;

Donkers, M .

EUROPEAN PHYSICAL JOURNAL C, 2004, 33 (02) :173-212

[6] CONSTRAINTS ON CHARGED-HIGGS-BOSON COUPLINGS [J].

ABBOTT, LF ;

SIKIVIE, P ;

WISE, MB .

PHYSICAL REVIEW D, 1980, 21 (05) :1393-1403

[7] NEARBY DOORWAY STATES, PARITY DOUBLETS, AND PARITY MIXING IN COMPOUND NUCLEAR-STATES [J].

AUERBACH, N ;

BOWMAN, JD ;

SPEVAK, V .

PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2638-2641

[8] Measurement of the running of the fine-structure constant [J].

Acciarri, M ;

Achard, P ;

Adriani, O ;

Aguilar-Benitez, M ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alviggi, MG ;

Ambrosi, G ;

Anderhub, H ;

Andreev, VP ;

Angelescu, T ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Baksay, L ;

Balandras, A ;

Ball, RC ;

Banerjee, S ;

Barczyk, A ;

Barillère, R ;

Barone, L ;

Bartalini, P ;

Basile, M ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Bellucci, L ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Bhattacharya, S ;

Biasini, M ;

Biland, A ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Böhm, A ;

Boldizsar, L ;

Borgia, B ;

Bourilkov, D ;

Bourquin, M ;

Braccini, S .

PHYSICS LETTERS B, 2000, 476 (1-2) :40-48

[9] Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP [J].

Achard, P ;

Adriani, O ;

Aguilar-Benitez, M ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alviggi, MG ;

Anderhub, H ;

Andreev, VP ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Bajo, A ;

Baksay, G ;

Baksay, L ;

Baldew, SV ;

Banerjee, S ;

Barczyk, A ;

Barillère, R ;

Bartilini, P ;

Basile, M ;

Batalova, N ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Bellucci, L ;

Berbeco, R ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Biasini, M ;

Biglietti, M ;

Biland, A ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Böhm, A ;

Boldizsar, L ;

Borgia, B ;

Bottai, S ;

Bourilkov, D ;

Bourquin, M ;

Braccini, S .

PHYSICS LETTERS B, 2005, 623 (1-2) :26-36

[10] AN IMPROVED MEASUREMENT OF ALPHA-S (MZ0) USING ENERGY CORRELATIONS WITH THE OPAL DETECTOR AT LEP [J].

ACTON, PD ;

ALEXANDER, G ;

ALLISON, J ;

ALLPORT, PP ;

ANDERSON, KJ ;

ARCELLI, S ;

ASHTON, P ;

ASTBURY, A ;

AXEN, D ;

AZUELOS, G ;

BAHAN, GA ;

BAINES, JTM ;

BALL, AH ;

BANKS, J ;

BARKER, GJ ;

BARLOW, RJ ;

BATLEY, JR ;

BEAUDOIN, G ;

BECK, A ;

BECKER, J ;

BEHNKE, T ;

BELL, KW ;

BELLA, G ;

BERLICH, P ;

BETHKE, S ;

BIEBEL, O ;

BINDER, U ;

BLOODWORTH, IJ ;

BOCK, P ;

BODEN, B ;

BOSCH, HM ;

BOUGEROLLE, S ;

BRABSON, BB ;

BREUKER, H ;

BROWN, RM ;

BRUN, R ;

BUIJS, A ;

BURCKHART, HJ ;

CAPILUPPI, P ;

CARNEGIE, RK ;

CARTER, AA ;

CARTER, JR ;

CHANG, CY ;

CHARLTON, DG ;

CLARKE, PEL ;

COHEN, I ;

COLLINS, WJ ;

CONBOY, JE ;

COOPER, M ;

COUCH, M .

PHYSICS LETTERS B, 1992, 276 (04) :547-564

← 1 2 3 4 5 6 7 8 9 10 →