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Titolo:
Top quark production near threshold and the top quark mass
Autore:
Beneke, M; Signer, A; Smirnov, VA;
Indirizzi:
CERN, Div Theory, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland23 N, Div Theory, CH-1211 Geneva 23, Switzerland Univ Durham, Dept Phys, Durham DH1 3LE, England Univ Durham Durham England DH1 3LE m, Dept Phys, Durham DH1 3LE, England Moscow State Univ, Inst Phys Nucl, Moscow 119889, Russia Moscow State Univ Moscow Russia 119889 Phys Nucl, Moscow 119889, Russia
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 1-2, volume: 454, anno: 1999,
pagine: 137 - 146
SICI:
0370-2693(19990513)454:1-2<137:TQPNTA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEAR-THRESHOLD; POLE MASS; PAIR PRODUCTION; HEAVY-QUARK; T(T)OVER-BAR PRODUCTION; MOMENTUM DISTRIBUTIONS; PERTURBATION-THEORY; E+E-ANNIHILATION; LEPTONIC DECAYS; CROSS-SECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Beneke, M CERN, Div Theory, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23 ory, CH-1211 Geneva 23, Switzerland
Citazione:
M. Beneke et al., "Top quark production near threshold and the top quark mass", PHYS LETT B, 454(1-2), 1999, pp. 137-146

Abstract

We consider tap-anti-top production near threshold in e(+)e(-) collisions,resumming Coulomb-enhanced corrections at next-to-next-to-leading order (NNLO). We also sum potentially large logarithms of the small top quark velocity at the next-to-leading logarithmic level using the renormalization group. The NNLO correction to the cross section is large, and it leads to a significant modification of the peak position and normalization. We demonstrate that an accurate top quark mass determination is feasible if one abandonsthe conventional pole mass scheme and if one uses a subtracted potential and the corresponding mass definition. Significant uncertainties in the normalization of the <(tt)over bar> cross section, however, remain. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 30/11/20 alle ore 17:02:46