Zobrazeno 1 - 10
of 280
pro vyhledávání: '"Soto, Joan"'
We calculate the leading and next-to-leading corrections to the real-time QCD static potential in a high temperature medium in the region where bound states transit from narrow resonances to wide ones. We find sizable contributions to both the real a
Externí odkaz:
http://arxiv.org/abs/2407.00310
Autor:
Soto, Joan, Valls, Sandra Tomàs
In the framework of the Born-Oppenheimer Effective Field Theory, the hyperfine structure of heavy quarkonium hybrids at leading order in the 1/m Q expansion is determined by two potentials. We estimate those potentials by interpolating between the kn
Externí odkaz:
http://arxiv.org/abs/2302.01765
Autor:
Soto, Joan, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 104, 074027 (2021)
Expressions for the potentials appearing in the nonrelativistic effective field theory description of doubly heavy baryons are known in terms of operator insertions in the Wilson loop. However, their evaluation requires nonperturbative techniques, su
Externí odkaz:
http://arxiv.org/abs/2108.00496
Autor:
Carignano, Stefano, Soto, Joan
Publikováno v:
Phys. Rev. D 102, 116021 (2020)
We generalize known results for heavy quarkonium in a thermal bath to the case of a finite baryonic density, and provide a number of formulas for the energy shift and decay width that hold at weak coupling for sufficiently large temperature and/or ch
Externí odkaz:
http://arxiv.org/abs/2009.07090
Autor:
Soto, Joan, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 102, 014012 (2020)
We propose an effective field theory to describe hadrons with two heavy quarks without any assumption on the typical distance between the heavy quarks with respect to the typical hadronic scale. The construction is based on Non-Relativistic QCD and i
Externí odkaz:
http://arxiv.org/abs/2005.00552
Autor:
Soto, Joan, Castellà, Jaume Tarrús
Publikováno v:
Phys. Rev. D 102, 014013 (2020)
We present an effective field theory for doubly heavy baryons that goes beyond the compact heavy diquark approximation. The heavy-quark distance $r$ is only restricted to $m_Q\gg 1/r \gg E_{bin}$, where $m_Q$ is the mass of the heavy quark and $E_{bi
Externí odkaz:
http://arxiv.org/abs/2005.00551
We calculate the two loop hard correction to the photon self-energy in an electron-positron plasma (EPP) for arbitrary soft momenta. This provides the only missing ingredient to obtain the Hard Thermal Loop (HTL) effective Lagrangian at next-to-leadi
Externí odkaz:
http://arxiv.org/abs/1909.10545
Autor:
Bazavov, Alexei, Brambilla, Nora, Tormo, Xavier Garcia i, Petreczky, Péter, Soto, Joan, Vairo, Antonio, Weber, Johannes Heinrich
Publikováno v:
Phys. Rev. D 100, 114511 (2019)
We present two determinations of the strong coupling \(\alpha_s\). The first one is from the static energy at three-loop accuracy, and may be considered an update of earlier determinations by some of us. The new analysis includes new lattice data at
Externí odkaz:
http://arxiv.org/abs/1907.11747
Publikováno v:
In Nuclear Physics, Section B July 2023 992
We present compact expressions for the power corrections to the hard thermal loop (HTL) Lagrangian of QED in $d$ space dimensions. These are corrections of order $(L/T)^2$, valid for momenta $L \ll T$, where $T$ is the temperature. In the limit $d\to
Externí odkaz:
http://arxiv.org/abs/1712.07949