A. A. Pivovarov

activity

19961999

e^{+} e^{-} \to t t ˉ

and

γ γ \to t t ˉ

observables near the threshold up to the next-to-next-to-leading order of NRQCD

26 citations · 26 across the 1 of their papers we have counts for

collaborators

6 papers

hep-ph1999★ 26 cited

Analytical results for $e^{+} e^{-} \to t t ˉ$ and $γ γ \to t t ˉ$ observables near the threshold up to the next-to-next-to-leading order of NRQCD

A. A. Penin, A. A. Pivovarov

We present an analytical description of top-antitop pair production near the threshold in $e^{+} e^{-}$ annihilation and $\g\g$ collisions. A set of basic observables considered include…

hep-ph1998

Top quark threshold production in $γ γ$ collision in the next-to-leading order

A. A. Penin, A. A. Pivovarov

The total cross section of the top quark-antiquark pair production near threshold in $γ γ$ collision is computed analytically up to the next-to-leading order in perturbative and non…

hep-ph1998

Bottom quark pole mass and $∣ V_{c b} ∣$ matrix element from $R (e^{+} e^{-} \to b b ˉ)$ and $Γ_{s l} (b \to c l ν_{l})$ in the next-to-next-to-leading order

A. A. Penin, A. A. Pivovarov

We present a consistent analysis of $Υ$ sum rules and $B$ -meson semileptonic width in the next-to-next-to-leading order in the strong coupling constant. The analysis is based on th…

hep-ph1998

Next-to-next-to-leading order relation between $R (e^{+} e^{-} \to b b ˉ)$ and $Γ_{sl} (b \to c l ν_{l})$ and precise determination of $∣ V_{c b} ∣$

A. A. Penin, A. A. Pivovarov

We present the next-to-next-to-leading order relation between the moments of the $Υ$ system spectral density and the inclusive $B$ -meson semileptonic width. The perturbative series…

hep-ph1998

Next-to-next-to-leading order vacuum polarization function of heavy quark near threshold and sum rules for $b b ˉ$ system

A. A. Penin, A. A. Pivovarov

A correlator of the vector current of a heavy quark is computed analytically near threshold in the next-to-next-to-leading order in perturbative and relativistic expansion that inc…

hep-ph1996

Practical techniques of QCD vs exact results of solvable models

A. A. Penin, A. A. Pivovarov

We check quantitatively the validity of some popular phenomenological approaches of QCD in simple models. Dispersion sum rules are considered within the ladder approximation of a f…

Analytical results for e+e−→ttˉ and γγ→ttˉ observables near the threshold up to the next-to-next-to-leading order of NRQCD

Top quark threshold production in γγ collision in the next-to-leading order

Bottom quark pole mass and ∣Vcb​∣ matrix element from R(e+e−→bbˉ) and Γsl​(b→clνl​) in the next-to-next-to-leading order

Next-to-next-to-leading order relation between R(e+e−→bbˉ) and Γsl​(b→clνl​) and precise determination of ∣Vcb​∣

Next-to-next-to-leading order vacuum polarization function of heavy quark near threshold and sum rules for bbˉ system

Practical techniques of QCD vs exact results of solvable models

Analytical results for $e^{+} e^{-} \to t t ˉ$ and $γ γ \to t t ˉ$ observables near the threshold up to the next-to-next-to-leading order of NRQCD

Top quark threshold production in $γ γ$ collision in the next-to-leading order

Bottom quark pole mass and $∣ V_{c b} ∣$ matrix element from $R (e^{+} e^{-} \to b b ˉ)$ and $Γ_{s l} (b \to c l ν_{l})$ in the next-to-next-to-leading order

Next-to-next-to-leading order relation between $R (e^{+} e^{-} \to b b ˉ)$ and $Γ_{sl} (b \to c l ν_{l})$ and precise determination of $∣ V_{c b} ∣$

Next-to-next-to-leading order vacuum polarization function of heavy quark near threshold and sum rules for $b b ˉ$ system