Description
Nov 2–6 (Nov 3 closed)
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Sanjay Reddy (University of Washington)11/2/26, 10:00 AM
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Bastian Brandt (Bielefeld University)11/2/26, 11:30 AM
The QCD equation of state (EoS) at non-zero density is the major input for the phenomenological description of many interesting physics systems, such as neutron stars, neutron star merger and heavy-ion collisions. Unfortunately, simulations at large baryon density, or, equivalently, chemical potentials, suffer from the complex action problem, prohibiting the direct computation of the EoS...
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Koichi Hattori (Zhejiang University)11/2/26, 2:00 PM
The moat regime has attracted considerable attention as a possible precursor to inhomogeneous phases in the QCD phase diagram at finite chemical potential. We investigate effects of a magnetic field and chiral anomaly that induce mixing between the scalar and pseudoscalar channels. By computing the effective action, we determine dispersion relations of the eigenmodes. Minima at finite momentum...
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Sota Hanai (Academia Sinica)11/2/26, 3:30 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
Understanding the response of relativistic plasmas is important for elucidating high-energy systems such as neutron stars, the early Universe, and heavy-ion collisions. In these systems, the chirality of fermions is known to induce non-trivial transport phenomena.
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Motivated by this, we study electromagnetic collective excitations in magnetized relativistic plasmas, taking the chiral charge... -
Akio Tomiya (TWCU)11/2/26, 4:00 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
Dense QCD is an important subject in strong-interaction physics. Lattice studies of dense strongly interacting matter have developed along several complementary directions, including two-color QCD at baryon density, three-color QCD using imaginary chemical potential and expansion methods, and three-color QCD at finite isospin density. These studies provide important benchmarks for onset,...
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Nora Brambilla (TUM)11/2/26, 4:30 PM
We show how the Born--Oppenheimer effective field theory (BOEFT) provides
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a unified description of ordinary and exotic quarkonia grounded on the
non-relativistic expansions of QCD and supplemented with lattice QCD inputs. We show applications of the BOEFT to tetraquarks, pentaquarks, quarkonium hybrids and to assess threshold effects in the quarkonium spectrum. We present the insights... -
Tyler Gorda (The Ohio State University)11/4/26, 10:00 AM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
How bad is the sign problem in QCD? It turns out that in the perturbative regime, the sign problem enters at $O(\alpha_s^3)$ in the strong coupling $\alpha_s$ to leading order. In this talk, I explain why the sign problem only enters at such high order, and I present the full $O(\alpha_s^3)$ result for it for all $\mu$ and $T$. I also explain how this result can be combined with future lattice...
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Muneto Nitta (Keio University)11/4/26, 11:30 AM
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11/4/26, 2:00 PM
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11/4/26, 3:30 PM
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Ryan Abbott (Columbia University)11/5/26, 10:00 AM
The problem of reconstructing spectral densities from noisy
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Euclidean-time Monte-Carlo data provides a valuable test-bed for
investigating real-time and inclusive observables, and sign problems
more broadly. In this talk, I will discuss new methods for spectral
reconstructions that unify several approaches, including
analyticity-based approaches (Nevanlinna-Pick interpolation,... -
Dr Srimoyee Sen (Iowa State University)11/5/26, 11:30 AM
Weak-interaction-mediated chiral imbalance generation in idealized massless electrons during core-collapse supernovae was once proposed to be the source of strong magnetic fields found in neutron stars. The effect goes by the name of chiral plasma instability. However, it was found that a finite electron mass damps out this process, inactivating the instability and preventing magnetic field...
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JAMES LATTIMER (Stony Brook University)11/5/26, 2:00 PM
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Prof. Sophia Han (T.D. Lee Institute, Shanghai)11/5/26, 2:30 PM
The neutron star interior reaches ultra-high densities with its composition details unknown. Gravitational wave emissions from neutron stars are promising probes that can help reveal novel phases of dense matter. In this talk, I will discuss the distinct behaviors of the adiabatic and equilibrium sound speeds in various theoretical models of the equation of state (EoS) for neutron-star matter,...
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David Edwin Alvarez Castillo (Institute of Nuclear Physics PAS and FCFM UANL)11/5/26, 3:00 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
In this work we present hybrid stars with a superconducting quark matter core covered by a hyperonic nuclear matter. The deconfined phase is modelled within a chirally symmetric density functional approach and follows a first order phase transition via a Maxwell construction from a hyperonic DD2 equation of state. While the hadronic phase is fixed, the range of properties of the quark matter...
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Yuki Fujimoto (Niigata University)11/5/26, 4:00 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
Color superconductivity arises from the Cooper logarithm near the quark Fermi surface. Conventional gap equations organized by total angular momentum can obscure distinct spin-orbital pairing channels; for example, the $J=0$ sector contains both ${}^{1}S_0$ and ${}^{3}P_0$. We revisit this problem using one-gluon-exchange helicity amplitudes and a renormalization-group theory near the Fermi...
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Loic Fernandez (Central China Normal University)11/5/26, 4:30 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
We will discuss the recent developments in renormalization group improvements of the cold and dense QCD pressure (Phys. Rev. D 111, 034020 and Phys. Rev. Lett. 129, 212001) at next-to-next-to leading order (NNLO) through the renormalization group optimized perturbation theory (RGOPT) and at all-order resummation of the soft modes. RGOPT applied for the very first time at NNLO displayed a...
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Chiho Nonaka (Hiroshima University / Nagoya University)11/5/26, 5:00 PM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
The equation of state (EOS) of high-density nuclear matter is one of the central questions in nuclear physics. Collisions of deformed nuclei provide a unique opportunity to probe the EOS by controlling the collision geometry through the orientation of the colliding nuclei. In particular, body–body collisions of strongly prolate nuclei such as U can generate a large spatial eccentricity even in...
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11/5/26, 6:00 PM
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Saga Sappi (ICE-CSIC & IEEC)11/6/26, 10:00 AM(4th week, Nov. 2-6) Dense QCD Matter and Compact Stars
Over the last decade or so, blazing-fast progress has been made in perturbative computations of dense QCD matter. With the sign problem preventing the use of lattice methods, pQCD is a rare first-principles methods for gaining insight into the properties of quark matter and, consequently, constraining the properties of the neutron star equation of state.
I will outline the current progress...
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Bao-An Li (East Texas A&M University)11/6/26, 11:30 AM
Understanding the equation of state (EOS) of dense, neutron-rich matter is a central goal of neutron star physics and is essential for identifying possible exotic phases and phase transitions in compact stars. To more precisely constrain the EOS, future high-precision X-ray and gravitational wave observatories are proposed to measure the radii of neutron stars (NSs) with an accuracy better...
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11/6/26, 2:00 PM
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11/6/26, 3:30 PM
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