Tag: Nuclear and High Energy Physics
Spin-dependent absorptive scattering shows universal patterns
What the study found The study finds that absorptive scattering of compact spinning bodies can be described with a finite number of Wilson coefficients, which are parameters used in effective theories to capture unknown microscopic effects. It also reports universal patterns in the leading-order impulse, including identical Casimir-independent contributions for spin-up and spin-down transitions of…
Localized BFSS phases are linked to instability and phase transitions
What the study found The study finds that the recently discovered localized and non-uniform phases of BFSS matrix quantum mechanics can be derived from first principles. It also finds that the uniform BFSS phase corresponds to a black string in a pp-wave background, which is unstable to a Gregory-Laflamme instability. Why the authors say this…
Modified PYTHIA mPDFs better satisfy symmetry and sum rules
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What the study found A modified algorithm based on PYTHIA produces equal-scale multi-parton distribution functions that are symmetric and satisfy the relevant sum rules more closely than earlier PYTHIA-based results. Why the authors say this matters The authors state that multi-parton distribution functions are important for predicting multiple scattering rates at hadron colliders, and the…
Transformer identifies heavily modified jets in heavy-ion collisions
What the study found The study found that a Transformer classifier can identify a class of jets in nucleus-nucleus collisions that have been unequivocally modified. It also found a robust estimate of the upper bound for the fraction of jets in nucleus-nucleus collisions that are indistinguishable from those produced in proton-proton collisions. Why the authors…
ANATAR is a Mathematica package for multi-loop computations
What the study found ANATAR is a new Mathematica package for multi-loop computations. It integrates several existing tools for higher-order amplitude generation and analysis, and it is described as efficient, user-friendly, and flexible. Why the authors say this matters The authors say ANATAR provides a platform for higher-order computations and is optimized for computations in…
New quantum bit thread prescriptions match holographic entropy formula
What the study found The authors derive several new quantum bit thread prescriptions for holographic entanglement entropy. They report that these prescriptions are equivalent, for static states, to the quantum extremal surface formula. Why the authors say this matters The study suggests that these prescriptions provide new ways to describe holographic entanglement entropy. The authors…
Bell nonlocality observed in tau-pair collisions at the LHC
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What the study found The study reports that tau-plus tau-minus pairs produced in proton-proton collisions at the Large Hadron Collider can be analyzed as an entangled two-qubit quantum state, and that Bell nonlocality was observed with high statistical significance. The authors say tau-plus tau-minus is an ideal system for quantum information studies in high-energy collisions.…
Machine learning helped identify viable dark matter regions in 2HDM2S
What the study found The study reports that a machine learning-based exploration, using Evolutionary Strategies, was able to efficiently search for regions with a viable dark matter candidate in the 2HDM2S model, a two real scalar singlet extension of the two Higgs doublet model. Why the authors say this matters The authors present this as…
Neutral-kaon decays can show CP violation through experimental efficiency
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What the study found CP violation in the kaon system can appear in decays to final states that contain neutral kaons. The authors say the relevant efficiency can be split into a kaon-energy part and a detector-dependent part that does not depend on the decay process. Why the authors say this matters The study suggests…
Two-component dark matter shows enhanced self-resonant scattering
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What the study found The study presents a two-component scalar dark matter model in which both dark matter components are stable because of a remaining Z4 gauge symmetry, left over from a U(1)′ local symmetry. Under a resonance condition for the dark matter masses, the authors report enhanced elastic co-scattering between the two dark matter…
