EFFECT OF THE T(T)OVER-BAR THRESHOLD ON ELECTROWEAK PARAMETERS

被引：88

作者：

KNIEHL, BA ^{[1
]}

SIRLIN, A ^{[1
]}

机构：

[1] NYU,DEPT PHYS,NEW YORK,NY 10003

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.47.883

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Threshold effects in e+e- --> ttBAR induce contributions to key electroweak parameters such as DELTArho, DELTAr, and sin2theta(W) beyond the scope of perturbative calculations of O(alpha) and O(alphaalpha(s)). We quantitatively analyze these effects using once-subtracted dispersion relations which manifestly satisfy relevant Ward identities. The derivation and properties of the dispersion relations are discussed at some length. We find that the threshold effects enhance the familiar perturbative O(alphaalpha(s)) corrections by between 25% and 40%, depending on the t-quark mass. The shift in the predicted value of the W-boson mass due to the threshold effects ranges from -8 MeV at m(t) = 91 GeV to -45 MeV at m(t) = 250 GeV.

引用

页码：883 / 893

页数：11

共 53 条

[1] LIMIT ON THE TOP-QUARK MASS FROM PROTON-ANTIPROTON COLLISIONS AT ROOT-S = 1.8 TEV [J].

ABE, F ;

AMIDEI, D ;

APOLLINARI, G ;

ATAC, M ;

AUCHINCLOSS, P ;

BADEN, AR ;

BACCHETTA, N ;

BAILEY, MW ;

BAMBERGER, A ;

DEBARBARO, P ;

BARNETT, BA ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BAUMANN, T ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENJAMIN, D ;

BENSINGER, J ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BHADRA, S ;

BINKLEY, M ;

BLAIR, R ;

BLOCKER, C ;

BOLOGNESI, V ;

BOOTH, AW ;

BOSWELL, C ;

BRANDENBURG, G ;

BROWN, D ;

BUCKLEYGEER, E ;

BUDD, HS ;

BUSETTO, G ;

BYONWAGNER, A ;

BYRUM, KL ;

CAMPAGNARI, C ;

CAMPBELL, M ;

CANER, A ;

CAREY, R ;

CARITHERS, W ;

CARLSMITH, D ;

CARROLL, JT ;

CASHMORE, R ;

CASTRO, A ;

CERVELLI, F ;

CHADWICK, K ;

CHIARELLI, G .

PHYSICAL REVIEW D, 1992, 45 (11) :3921-3948

[2] LOWER LIMIT ON THE TOP-QUARK MASS FROM EVENTS WITH 2 LEPTONS IN PPBAR COLLISIONS AT SQUARE-ROOT=1.8 TEV [J].

ABE, F ;

AMIDEI, D ;

APOLLINARI, G ;

ATAC, M ;

AUCHINCLOSS, P ;

BADEN, AR ;

BACCHETTA, N ;

BAILEY, MW ;

BAMBERGER, A ;

BARNETT, BA ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BAUMANN, T ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENJAMIN, D ;

BENSINGER, J ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BHADRA, S ;

BINKLEY, M ;

BLAIR, R ;

BLOCKER, C ;

BOLOGNESI, V ;

BOOTH, AW ;

BOSWELL, C ;

BRANDENBURG, G ;

BROWN, D ;

BUCKLEYGEER, E ;

BUDD, HS ;

BUSETTO, G ;

BYONWAGNER, A ;

BYRUM, KL ;

CAMPAGNARI, C ;

CAMPBELL, M ;

CANER, A ;

CAREY, R ;

CARITHERS, W ;

CARLSMITH, D ;

CARROLL, JT ;

CASHMORE, R ;

CASTRO, A ;

CERVELLI, F ;

CHADWICK, K ;

CHIARELLI, G ;

CHINOWSKY, W .

PHYSICAL REVIEW LETTERS, 1992, 68 (04) :447-451

[3] MEASUREMENT OF THE W-BOSON MASS IN 1.8-TEV PBARP COLLISIONS [J].

ABE, F .

PHYSICAL REVIEW D, 1991, 43 (07) :2070-2093

[4] MEASUREMENT OF THE W-BOSON MASS [J].

ABE, F ;

AMIDEI, D ;

APOLLINARI, G ;

ATAC, M ;

AUCHINCLOSS, P ;

BADEN, AR ;

BAMBERGER, A ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENSINGER, J ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BHADRA, S ;

BINKLEY, M ;

BLAIR, R ;

BLOCKER, C ;

BOOTH, AW ;

BRANDENBURG, G ;

BROWN, D ;

BUCKLEY, E ;

BYON, A ;

BYRUM, KL ;

CAMPAGNARI, C ;

CAMPBELL, M ;

CAREY, R ;

CARITHERS, W ;

CARLSMITH, D ;

CARROLL, JT ;

CASHMORE, R ;

CERVELLI, F ;

CHADWICK, K ;

CHIARELLI, G ;

CHINOWSKY, W ;

CIHANGIR, S ;

CLARK, AG ;

CONNOR, D ;

CONTRERAS, M ;

COOPER, J ;

CORDELLI, M ;

CRANE, D ;

CURATOLO, M ;

DAY, C ;

DELLAGNELLO, S ;

DELLORSO, M .

PHYSICAL REVIEW LETTERS, 1990, 65 (18) :2243-2246

[5] AN IMPROVED DETERMINATION OF THE RATIO OF W AND Z MASSES AT THE CERN PBARP COLLIDER [J].

ALITTI, J ;

AMBROSINI, G ;

ANSARI, R ;

AUTIERO, D ;

BAREYRE, P ;

BERTRAM, IA ;

BLAYLOCK, G ;

BONAMY, P ;

BORER, K ;

BOURLIAUD, M ;

BUSKULIC, D ;

CARBONI, G ;

CAVALLI, D ;

CAVASINNI, V ;

CENCI, P ;

CHOLLET, JC ;

CONTA, C ;

COSTA, G ;

COSTANTINI, F ;

COZZI, L ;

CRAVERO, A ;

CURATOLO, M ;

DELLACQUA, A ;

DELPRETE, T ;

DEWOLF, RS ;

DILELLA, L ;

DUCROS, Y ;

EGAN, GF ;

EINSWEILER, KF ;

ESPOSITO, B ;

FAYARD, L ;

FEDERSPIEL, A ;

FERRARI, R ;

FRATERNALI, M ;

FROIDEVAUX, D ;

FUMAGALLI, G ;

GAILLARD, JM ;

GIANOTTI, F ;

GILDEMEISTER, O ;

GOSSLING, C ;

GOGGI, VG ;

GRUNENDAHL, S ;

HARA, K ;

HELLMAN, S ;

HRIVNAC, J ;

HUFNAGEL, H ;

HUGENTOBLER, E ;

HULTQVIST, K ;

IACOPINI, E ;

INCANDELA, J .

PHYSICS LETTERS B, 1992, 276 (03) :354-364

[6]

ALTARELLI G, 1992, UNPUB WORKSHOP QCD 2

[7] RADIATIVE CORRECTION EFFECTS OF A VERY HEAVY TOP [J].

BARBIERI, R ;

BECCARIA, M ;

CIAFALONI, P ;

CURCI, G ;

VICERE, A .

PHYSICS LETTERS B, 1992, 288 (1-2) :95-98

[8] UNCERTAINTIES IN THE HADRONIC CONTRIBUTION TO THE QED VACUUM POLARIZATION [J].

BURKHARDT, H ;

JEGERLEHNER, F ;

PENSO, G ;

VERZEGNASSI, C .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1989, 43 (03) :497-501

[9]

BURKHARDT H, 1989, Z PHYS C, V209, P337

[10] WEAK INTERACTIONS OF ULTRA HEAVY FERMIONS [J].

CHANOWITZ, MS ;

FURMAN, MA ;

HINCHLIFFE, I .

PHYSICS LETTERS B, 1978, 78 (2-3) :285-289

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