Higher-order Coulomb corrections to the threshold e+e− → W+W− cross section

Fadin, V.S.; Хозе, В. А.; Martin, A. D.; Stirling, W. J.

doi:10.1016/0370-2693(95)01194-u

Cited by 34 publications

(30 citation statements)

References 15 publications

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“…2 We are considering here and in what follows only the first-order Coulomb formulae. As shown in [8,16] the higher order Coulomb effects are practically negligible.…”

Section: Ansatz For the Non-factorizable Correctionsmentioning

confidence: 94%

Screened-Coulomb ansatz for the nonfactorizable radiative corrections to off-shell $W^+W^-$ production

Chapovsky¹,

Хозе²

1999

Eur. Phys. J. C

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We demonstrate that the results of the complete first order calculation of the non-factorizable QED corrections to the single-inclusive cross-sections for e + e − → W + W − → 4 fermions could be very well reproduced by a simple physically motivated ansatz. The latter allows to take into account effectively the screening role of the non-Coulomb radiative mechanisms by introducing a dampening factor in front of the width-dependent part of the known first-order Coulomb correction, the so-called screened-Coulomb ansatz.

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“…2 We are considering here and in what follows only the first-order Coulomb formulae. As shown in [8,16] the higher order Coulomb effects are practically negligible.…”

Section: Ansatz For the Non-factorizable Correctionsmentioning

confidence: 94%

Screened-Coulomb ansatz for the nonfactorizable radiative corrections to off-shell $W^+W^-$ production

Chapovsky¹,

Хозе²

1999

Eur. Phys. J. C

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“…The analytical input formulae are found in [3,5,[7][8][9]6,[10][11][12]17] and in references therein. Numerical integrations are performed by a fast and stable self-adaptive Simpson algorithm realized in the subroutines SIMPS and FDSIMP 5 .…”

Section: Features Of Gentle/4fanmentioning

confidence: 99%

“…For the CC03 process, a significant QED radiative correction is the so-called Coulomb singularity [11,12,14] originating from the exchange of photons between the two resonant W bosons. It effects in a factor (1 + F Coulomb ) to be multiplied to the twofold differential cross-section of equation (2.4) or to the threefold differential cross-section of equation (2.6).…”

Section: Initial State Qed Radiative Correctionsmentioning

confidence: 99%

GENTLE/4fan v. 2.0 A program for the semi-analytic calculation of predictions for the process e+e− → 4f

Bardin¹,

Biebel²,

Lehner³

et al. 1997

Computer Physics Communications

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We describe version 2.0 of the Fortran program GENTLE/4fan for the semi-analytic computation of cross-sections and distributions in four-fermion production in e + e − annihilation. GENTLE/4fan covers all charged current and neutral current fourfermion final states with no identical particles, no electrons, and no electron neutrinos in the final state. Initial state radiation representing the most relevant quantum corrections and anomalous triple gauge boson couplings have been included. Semi-analytic; numerical integration of analytic formulae: (i) Born approximation: Numerical integrations over two virtualities s 1 , s 2 plus optionally over the boson production angle θ; (ii) QED corrections in the flux function approach (FF): one additional numerical integration over virtuality s ′ ; (iii) QED corrections in the structure function approach (SF): alternatively to (ii), two additional numerical integrations over x 1 , x 2 Restrictions on complexity of the problem: Only selective experimental cuts are possible; the program calculates total cross-sections and the distribution in the boson production angle; background contributions are available only for selected final state configurations; no inclusion of pure weak corrections Typical running time:The running time strongly depends upon the options used; one finds e.g.: Born cross-section on-shell: below one sec., off-shell: few secs.; LLA QED corrections (FF) on-shell: few secs.; off-shell: few mins.; LLA QED corrections (SF) on-shell: few secs.; off-shell: several mins.; complete ISR (FF): on-shell: few mins., off-shell: several hours; with background: from few secs. (no QED) to several hours (with QED); with anomalous couplings: from few secs. (no QED) to several mins. (with QED)

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“…where [4]. Finally, the corrections due to initial state radiation, which are sensitive to the lepton mass, m l , must be included.…”

Section: Measurement Of the W Massmentioning

confidence: 99%

Precision measurements at a muon collider

Dawson

1996

AIP Conference Proceedings

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Higher-order Coulomb corrections to the threshold e+e− → W+W− cross section

Cited by 34 publications

References 15 publications

Screened-Coulomb ansatz for the nonfactorizable radiative corrections to off-shell $W^+W^-$ production

Screened-Coulomb ansatz for the nonfactorizable radiative corrections to off-shell $W^+W^-$ production

GENTLE/4fan v. 2.0 A program for the semi-analytic calculation of predictions for the process e+e− → 4f

Precision measurements at a muon collider

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