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Titolo:
TOPAZ0 - A PROGRAM FOR COMPUTING OBSERVABLES AND FOR FITTING CROSS-SECTIONS AND FORWARD-BACKWARD ASYMMETRIES AROUND THE Z(0) PEAK
Autore:
MONTAGNA G; PICCININI F; NICROSINI O; PASSARINO G; PITTAU R;
Indirizzi:
INFN,SEZ PAVIA,VIA A BASSI 6 I-27100 PAVIA ITALY INFN,SEZ PAVIA,VIA A BASSI 6 I-27100 PAVIA ITALY UNIV PAVIA,INFN,DIPARTIMENTO FIS NUCL & TEOR,SEZ PAVIA I-27100 PAVIA ITALY UNIV TURIN,INFN,DIPARTIMENTO FIS TEOR,SEZ TORINO I-10125 TURIN ITALY
Titolo Testata:
Computer physics communications
fascicolo: 3, volume: 76, anno: 1993,
pagine: 328 - 360
SICI:
0010-4655(1993)76:3<328:T-APFC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONE-LOOP CORRECTIONS; RADIATIVE-CORRECTIONS; BHABHA SCATTERING; COLLINEAR PHOTONS; MASS CORRECTIONS; DECAY-RATE; ELECTROWEAK; ANGLE; Z0; ANNIHILATION;
Keywords:
E+E- ANNIHILATION; BHABHA SCATTERING; LEP; Z(0) RESONANCE; ELECTROWEAK; EXTRAPOLATED AND REALISTIC EXPERIMENTAL SET-UP; QCD CORRECTIONS; QED CORRECTIONS; PURE WEAK CORRECTIONS; RADIATIVE CORRECTIONS; MINIMAL STANDARD MODEL; FIT TO CROSS SECTIONS AND FORWARD BACKWARD ASYMMETRIES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
CompuMath Citation Index
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
G. Montagna et al., "TOPAZ0 - A PROGRAM FOR COMPUTING OBSERVABLES AND FOR FITTING CROSS-SECTIONS AND FORWARD-BACKWARD ASYMMETRIES AROUND THE Z(0) PEAK", Computer physics communications, 76(3), 1993, pp. 328-360

Abstract

The program TOPAZ0, which is designed for computing and fitting crosssections and forward-backward asymmetries of e+e- annihilation into fermion pairs and of Bhabha scattering around the Z0 peak, is described. The various observables are computed over both a completely inclusive experimental set-up and a realistic one, i.e. with cuts on acollinearity, energy or invariant mass and angular acceptance of the outgoing fermions. Pure weak corrections at the one-loop level are included andleading higher-order corrections due to a potentially large top quarkmass are taken into account. Depending on the experimental set-up initial state QED corrections are included by a convolution of the weaklycorrected kernel distribution with a radiator function or with structure functions, where resummation of soft-photon effects and hard-photon emission up to O(alpha2) are taken into account. Final state QED radiation, even in the presence of kinematical cuts, is treated analytically and exactly at O(alpha) and higher-order contributions are taken into account. QCD effects for the parameters of the Z0 resonance and for s-dependent quantities are included. Recently proposed higher-order corrections, as initial state leptonic and hadronic pair production orO(G(F)2m(t)4), O(alpha(s)G(F)m(t)2), O(alpha(s)3), are taken into account as well. The program structure is highly modular and particular care has been devoted to computing efficiency and speed, both for annihilation and Bhabha channels.

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Documento generato il 23/11/20 alle ore 21:39:04