| Volume 108, Issues 1 - 2 July 2023 | | Advertisement  | The first published articles from PRX Life, APS's new interdisciplinary, open-access journal exclusively for quantitative biological research, are now online. Access highly selective research at the intersection of physics and biology every month by signing up for alerts. | | | | | |
Advertisement | Get to know the candidates for Vice President, General Councilor, International Councilor, and Chair-Elect of the Nominating Committee. Polls are currently open, and will close August 25. Learn more. | | | | | Advertisement | 2024 Committee Nominations are currently open, and will close August 4. Please nominate colleagues (or yourself). Service by APS's diverse, talented, and engaged membership strengthens our community and enhances the leadership skills of committee members. | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Featured in Physics R. Aaij et al. (LHCb Collaboration) Phys. Rev. D 108, 012017 (2023) – Published 27 July 2023  | CERN's Large Hadron Collider has detected the signals of two new four-quark states that are unusual because of their charges and their quark compositions. | | | | | | Editors' Suggestion Maarten Golterman, Kim Maltman, and Santiago Peris Phys. Rev. D 108, 014007 (2023) – Published 11 July 2023  | Contour-Improved Perturbation Theory and Fixed-Order Perturbation Theory are two methods used to approach the poorly converging QCD calculations involved in extracting the strong coupling constant from tau decays. However, they give somewhat differing results. Here, the authors introduce a new measure of the distance between the FOPT Borel sum and the CIPT series which clarifies the differences, and confirms that CIPT is inconsistent with the Operator Product Expansion. | | | | | | Editors' Suggestion Luis Altenkort, Alexander M. Eller, Anthony Francis, Olaf Kaczmarek, Lukas Mazur, Guy D. Moore, and Hai-Tao Shu Phys. Rev. D 108, 014503 (2023) – Published 11 July 2023  | The shear and bulk viscosities in the Quark-Gluon Plasma are quantities of enormous interest for the collisions of heavy ions at RHIC and the LHC. Using lattices up to 1443 x 36 in size, and applying gradient flow and blocking methods with high precision, the authors compute these viscosities at 1.5 times the deconfining transition temperature in the pure glue theory. This shows that obtaining values with dynamical quarks, which can be compared directly to experiment, is feasible in the near future. | | | | | | Editors' Suggestion M. Mallaby-Kay et al. Phys. Rev. D 108, 023516 (2023) – Published 18 July 2023  | This paper introduces a novel, "hybrid" (optical+spectroscopic) estimator for kinematic Sunyaev-Zel'dovich (kSZ) studies. It is expected to be most useful for increasing the SZ signal when results from upcoming data surveys become available. | | | | | | Editors' Suggestion Jordan Cotler and Semon Rezchikov Phys. Rev. D 108, 025003 (2023) – Published 5 July 2023  | This highly original paper relates the exact renormalization group (ERG) flow to optimal gradient flow which naturally leads to the (previously known) interpretation of the ERG as a flow that minimizes the relative entropy of a probability distribution. This provides an elegant explanation of otherwise opaque features of ERG schemes and establishes a clear and intriguing link to information theory. The intuitive picture that emerges is that the coarse-graining of the RG flow produces entropy and this entropy production determines the flow itself. All these basic relations are established nonperturbatively. | | | | | | | |
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