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On 1st of November, the KNAW organized a meeting on Plan S for making Open Access a reality by 2020. At this meeting, Robert-Jan Smits, the driving force behind this plan, gave an enlightening presentation in which he singled out and strongly endorsed SciPost (from 2:00 on), calling it a "marvelous initiative".
Interestingly, he suggested that "Rhodium" was a more appropriate descriptor for SciPost than Platinum or Diamond. In his words, Rhodium is a "precious metal, which is rock solid, highly reflective, and can resist corrosion" and fits SciPost, "which deserves a classification of its own", better.
SciPost is very grateful for this greatly encouraging recognition, and will redouble its efforts in implementing the transition to Open Access by realizing its vision for the future: Plan SciPost.
"Monitoring continuous spectrum observables: the strong measurement limit" by Michel Bauer, Denis Bernard, Tony Jin has received the Select label.
When monitoring quantum observables with continuous spectrum, the internal system evolution can compete with the measurement process. This competition induces a peculiar stochastic dynamics of the systems states which needs to be deciphered. In this well written and didactic paper, the authors rigorously formulate this challenging problem and study strong measurement limits. The analysis developed in this paper is expected to motivate further mathematical work based on the author’s approach, and a discussion can be started in the field.
"Deep-learned Top Tagging with a Lorentz Layer" by Anja Butter, Gregor Kasieczk, Tilman Plehn and Michael Russel has received the Select label.
Deep learning techniques based on low-level detector output are a promising new way to identify patterns in proton collision data at the LHC. They will, for example, allow us to identify the elementary particles making up so-called jets. This paper introduces a novel tagger that can identify boosted decaying top quarks using a set of measured four-momenta. It first shows that such taggers will outperform established techniques in a realistic detector environment. In addition, it traces the relevant patterns to the particle masses involved, extracted through the appropriate Minkowski metric.
"On the coupling of Galilean-invariant field theories to curved spacetime" by Kristan Jensen has received a Select label.
This study presents a novel way to solve the problem of coupling Galilean-invariant quantum field theories to a fixed spacetime, which is very important for the Quantum Field Theory applications to condensed matter systems. The author shows that Newton-Cartan geometry subject to the shift symmetry arises in null reductions of Lorentzian manifolds. Thus, his proposal is realized for theories which are holographically dual to quantum gravity on Schrodinger spacetimes. He uses this null reduction to efficiently form tensorial invariants under the boost and particle number symmetries. They also explore the coupling of Schrodinger-invariant field theories to spacetime, which would necessitate the Newton-Cartan analogue of Weyl invariance. The clear exposition and solution presented expands on previous work, providing many sanity checks and find a new way to relates his construction to null reductions of Lorentzian manifolds, which is conceptually important and of great help in relating these sorts of non-relativistic constructions to better understood physics on Lorentzian manifolds.
"Illuminating the photon content of the proton within a global PDF analysis" by Valerio Bertone, Stefano Carrazza, Nathan P. Hartland and Juan Rojo has received the Select label.
This study tackles the precision issues caused at the LHC by the photon content of the proton, where it is found that corrections of up to 20% might be needed in many processes due to photon-initiated contributions. For the first time, the authors used the LUXqed formalism combined with the global NNPDF analysis framework. By combining these two methods, a state-of-the-art description of the photon content within the proton can be achieved, and the precision of theory predictions of LHC processes can be highly improved. Moreover, the authors consider the implications of this study in a range of phenomenological applications, which is particularly interesting for the interpretation of present and future LHC measurements.
"Phases of adjoint QCD3 and dualities" by Jaume Gomis, Zohar Komargodski and Nathan Seiberg is the first SciPost Physics article to receive the Select label.
This is an exploration of the phase diagram of three-dimensional gauge theory, both for large and small fermion masses. It is particularly tricky to obtain the phase diagrams for small masses, where quantum effects start to dominate. By applying general considerations of symmetries, anomalies and renormalisation group flows, the authors identified a hidden “quantum phase” in between the two semi-classical phase regions. This leads to the existence of certain dualities, for which the authors provide compelling evidence. Using a Chern-Simons term coupled to an adjoint Majorana fermion, the authors are able to successfully create a convincing phase diagram for three-dimensional gauge theory.