Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Pikelner, Andrey"'
We present the high-precision result for the zero-jettiness soft function at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD. At this perturbative order, the soft function is the last missing ingredient required for the computation o
Externí odkaz:
http://arxiv.org/abs/2409.11042
We present an analytic calculation of the one-loop correction to the double-real emission contribution to the zero-jettiness soft function at N3LO in QCD, accounting for both gluon-gluon and quark-antiquark soft final-state partons. We explain all th
Externí odkaz:
http://arxiv.org/abs/2401.05245
Autor:
Lee, Roman N., Pikelner, Andrey F.
We use dimensional recurrence relations and analyticity to calculate four-loop propagator-type master integrals in the heavy-quark effective theory. Compared to previous applications of the DRA method, we apply a new technique of fixing homogeneous s
Externí odkaz:
http://arxiv.org/abs/2211.03668
Autor:
Antipin, Oleg, Bednyakov, Alexander, Bersini, Jahmall, Panopoulos, Pantelis, Pikelner, Andrey
Publikováno v:
Phys.Rev.Lett. 130 (2023) 2, 021602
Quantum field theories with global symmetries simplify considerably in the large-charge limit allowing to compute correlators via a semiclassical expansion in the inverse powers of the conserved charges. A generalization of the approach to gauge symm
Externí odkaz:
http://arxiv.org/abs/2210.10685
We calculate the small angle expansion of the four-loop QCD cusp anomalous dimension. As a byproduct of our calculation, we also obtain the four-loop anomalous dimension of the heavy-quark field in HQET. The validity of the calculational setup is cro
Externí odkaz:
http://arxiv.org/abs/2208.09277
Autor:
Bednyakov, Alexander, Pikelner, Andrey
A technique of large-charge expansion provides a novel opportunity for calculation of critical dimensions of operators $\phi^Q$ with fixed charge $Q$. In the small-coupling regime the polynomial structure of the anomalous dimensions can be fixed from
Externí odkaz:
http://arxiv.org/abs/2208.04612
Autor:
Pikelner, Andrey
We calculate four-loop order corrections to the critical exponent $\eta$ in the two-field model of flat phase membranes. Obtained results show better agreement with the other calculation methods and confirm the validity of the perturbative approach t
Externí odkaz:
http://arxiv.org/abs/2112.07340
Autor:
Lee, Roman N., Pikelner, Andrey F.
We calculate the leading Coulomb correction to the energy loss in the electron-nucleus Bremsstrahlung for arbitrary energy of the incoming particle. This correction determines the charge asymmetry, i.e., the difference of electron and positron energy
Externí odkaz:
http://arxiv.org/abs/2109.04926
Autor:
Bednyakov, Alexander, Pikelner, Andrey
Publikováno v:
Phys. Rev. Lett. 127, 041801 (2021)
We present the beta functions of gauge and Yukawa couplings in general four-dimensional quantum field theory, at four and three loops, respectively. The essence of our approach is fixing unknown coefficients in the most general ansatz for beta-functi
Externí odkaz:
http://arxiv.org/abs/2105.09918
Autor:
Pikelner, Andrey
This paper provides details of the massless three-loop three-point integrals calculation at the symmetric point. Our work aimed to extend known two-loop results for such integrals to the three-loop level. Obtained results can find their application i
Externí odkaz:
http://arxiv.org/abs/2104.06958