129 citations · 242 across the 9 of their papers we have counts for
10 papers
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…
Poincaré invariance in NRQCD and pNRQCD revisited
Matthias Berwein, Nora Brambilla, Sungmin Hwang +1
We investigate how fields transform under the Poincaré group in nonrelativistic effective field theories of QCD. In constructing these transformations, we rely only on symmetries a…
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…
Power Divergences in Overlapping Wilson Lines
Matthias Berwein
We discuss the divergence structure of Wilson line operators with partially overlapping segments on the basis of the cyclic Wilson loop as an explicit example. The generalized expo…
Ultraviolet divergences in the cyclic Wilson loop and their renormalization
Matthias Berwein
We discuss the cyclic Wilson loop, i.e. a rectangular Wilson loop that spans the entire compactified time axis in the imaginary time formalism. The result of a perturbative calcula…
Renormalization of the cyclic Wilson loop
Matthias Berwein, Nora Brambilla, Jacopo Ghiglieri +1
In finite-temperature field theory, the cyclic Wilson loop is defined as a rectangular Wilson loop spanning the whole compactified time direction. In a generic non-abelian gauge th…