Contents

Configuration

Configuration files support JSON-like syntax and contain general steering parameters for a run, FOAM parameters, kinematic cuts and parameters of the Standard Model. The configuration can be split into several files and included to index.conf file by .include <relative or absolute path to file> macro.

General parameters

outputDir [string]

set output directory in which results are stored

Process parameters

pid [integer]

defines a process to calculate:

• 101: \(e^+e^- \to e^-e^+\),

• 102: \(e^+e^- \to ZH\)

• 103: \(e^+e^- \to \mu^-\mu^+\),

• 104: \(e^+e^- \to \tau^-\tau^+\).

ecm [double]

sets collider energy in the center-of-momentum frame.

alr [integer]

switches generation mode:

• 0: \(\sigma\),

• 1: \(\sigma_{RL}-\sigma_{LR}\),

• 2: \(\sigma_{RL}+\sigma_{LR}\),

• 3: \(\sigma_{0L}-\sigma_{0R}\),

• 4: \(\sigma_{0L}+\sigma_{0R}\).

lamep [double]

polarization degree of the positron.

lamem [double]

polarization degree of the electron.

costhcut [double]

cut on \(|\cos\theta|\) for both final state particle.

e5max [double]

cut on maximum energy of hard photon.

ome [double]

is the parameter separating contributions from soft and hard photon Bremsstrahlung (\(\omega=ome \sqrt{s}/2\)).

Flags controlling components of the NLO EW computations

iqed [integer]

• 0: disables QED corrections,

• 1: with full QED corrections,

• 2: only initial state QED radiation (ISR),

• 3: initial-final QED radiation interference term (IFI),

• 4: only final state QED radiation (FSR),

• 5: sum of initial and final state radiation contributions [IFI+FSR],

• 6: sum of initial state and initial-final QED interference terms [ISR+IFI].

iew [integer]

• 0: disables weak corrections,

• 1: enables weak corrections.

iborn [integer]

• 0: enables NLO corrections,

• 1: forces LO calculation.

ifgg [integer]

• 1: default vacuum polarization \((1+\mathcal{F}_{\gamma\gamma}(\mathrm{NLO}))\),

• 2: ressummed vacuum polarization \((1/[1 - \mathcal{F}_{\gamma\gamma}(\mathrm{NLO})])\).

irun [integer]

• 0: fixed gauge boson width,

• 1: running gauge boson width.

gfscheme [integer]

flag selects electroweak scheme in which the calculation is performed:

• 0: \(\alpha(0)\)-scheme,

• 1: \(G_{\mu}\)-scheme,

• 2: \(\alpha(M_Z)\)-scheme.

iqedll [integer]

• 0: disables LL ISR QED corrections,

• 1: \(O(alpha L)\) gamma corrections. Attention! Double counting is possible! Only for crosscheck.

• 2: \(O(alpha^2 L^2)\) gamma corrections,

• 3: \(O(alpha^2 L^2)\) el pair corrections,

• 4: \(O(alpha^2 L^2)\) mu pair corrections,

• 5: \(O(alpha^3 L^3)\) gamma corrections,

• 6: \(O(alpha^3 L^3)\) el pair corrections,

• 7: \(O(alpha^3 L^3)\) mu pair corrections,

• 8: \(O(alpha^4 L^4)\) gamma corrections,

• 9: \(sum_{n=2}^2 O(alpha^n L^n)\) corrections,

• 10: \(sum_{n=2}^3 O(alpha^n L^n)\) corrections,

• 11: \(sum_{n=2}^4 O(alpha^n L^n)\) corrections – best choice.

deltall [double]

small auxiliary parameter for LL corrections calculation. The result does not depend on it.

scalell [double]

scale at which LL corrections are calculated.

Standard Model parameters

alpha, gf, alphas, conhc [double]

a list of constants and coefficients:

\(\alpha_{EM}\), \(G_{\mu}\), \(\alpha_{S}\), conversion constant from \(GeV^{-2}\) to pb.

mw, mz, mh [double]

W, Z, Higgs boson masses.

wz, ww, wh, wtp [double]

W, Z, Higgs and the top quark widths.

men, mel, mmn, mmo, mtn, mta [double]

\(\nu_e\), e, \(\nu_{\mu}\), \(\mu\), \(\nu_{\tau}\), \(\tau\) lepton masses.

mdn, mup, mst, mch, mbt, mtp [double]

d, u, s, c, b, t quark masses.

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