129 citations · 242 across the 9 of their papers we have counts for
6 papers · 1 filter
One BornOppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
Matthias Berwein, Nora Brambilla, Abhishek Mohapatra +1
The discovery of XYZ exotic states in the hadronic sector with two heavy quarks, represents a significant challenge in particle theory. Understanding and predicting their nature re…
Perturbative static quark potential in Maximal Abelian gauge
Matthias Berwein, Yukinari Sumino
We calculate the static quark potential for an SU(N) gauge theory in the Maximal Abelian gauge as well as its Abelian projection up to two loops in perturbation theory. We discuss…
Polyakov loop correlator in perturbation theory
Matthias Berwein, Nora Brambilla, Peter Petreczky +1
We study the Polyakov loop correlator in the weak coupling expansion and show how the perturbative series re-exponentiates into singlet and adjoint contributions. We calculate the…
An effective field theory approach to hybrids
Matthias Berwein
Heavy quarkonium hybrids are studied in an effective field theory framework. Coupled and uncoupled Schrödinger equations are obtained for different quantum numbers of the hybrid st…
The Polyakov loop at next-to-next-to leading order
Matthias Berwein, Nora Brambilla, Peter Petreczky +1
We calculate the next-to-next-to-leading correction to the expectation value of the Polyakov loop or equivalently to the free energy of a static charge. This correction is of order…
Quarkonium Hybrids with Nonrelativistic Effective Field Theories
Matthias Berwein, Nora Brambilla, Jaume Tarrus Castella +1
We construct a nonrelativistic effective field theory description of heavy quarkonium hybrids from QCD. We identify the symmetries of the system made of a heavy quark, a heavy anti…