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ATLAS Collaboration(Aad, G. et al), Ahuja, S., Aikot, A., Cabrera Urban, S., Cantero, J., Carrion Martinez, C., et al. (2026). Search for charginos and neutralinos with B – L R-parity violating decays in √s=13 TeV and 13.6 TeV pp collisions with the ATLAS detector. Phys. Rev. D, 114(5), 052007–33pp.
Abstract: A search is performed for the electroweak pair production of charginos and associated production of a chargino and neutralino, each of which decays through an R-parity-violating coupling into a lepton and a W, Z, or Higgs boson. This search targets the Higgs boson decay channel of the charginos and neutralinos, using events with three or more b-tagged jets and one or two electrons or muons. The analyzed data corresponds to an integrated luminosity of 140 fb(-1) and 56 fb(-1) of proton-proton collision data produced by the Large Hadron Collider at center-of-mass energies of root s = 13 TeV and root s = 13.6 TeV, respectively, collected by the ATLAS experiment between 2015 and 2023. The data are found to be consistent with predictions from the Standard Model. The results are interpreted as limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model. Limits are also set on the production of charginos and neutralinos for a minimal supersymmetric Standard Model with an additional B – L gauge symmetry that is spontaneously broken. Charginos and neutralinos with masses between 150 GeV and 1100 GeV are excluded at 95% confidence level for a scenario in which they decay via Higgs bosons, assuming equal decay branching fractions to each lepton flavor. Additional limits on chargino and neutralino production are derived for flavor-specific decay scenarios where the charginos decay into a single lepton flavor.
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LHCb Collaboration(Aaij, R. et al), Fernandez Casani, A., Jaimes Elles, S. J., Jashal, B. K., Libralon, S., Lucio Martinez, M., et al. (2026). Measurement of CP asymmetries in (B)over-bar0 → Ds- D+ and (B)over-bars0 →Ds- D- decays. J. High Energy Phys., 08(8), 056–22pp.
Abstract: Measurements of the combined CP asymmetries in (B) over bar (0) -> D-s(-) D+ and (B) over bar (0)(s) -> D-s(-) D- decays are made using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb(-1). The measurements are found to be A(CP) ((B) over bar (0) -> D-s(-) D+) = 0.0009 +/- 0.0053 +/- 0.0040, A(CP) ((B) over bar (0)(s) -> D-s(-) D-) = 0.103 +/- 0.053 +/- 0.010, where the first and second uncertainties are statistical and systematic, respectively. This is the first measurement of this asymmetry in (B) over bar (0)(s) decays, and the most precise measurement to date for (B) over bar (0) decays. Both measurements are found to be consistent with CP symmetry.
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Lyu, W. T., Oset, E., Li, D. M., & Wang, E. (2026). Identifying Σ(1380) and Σ(1430) in the J/ψ→ΛπΣ¯ reaction. Eur. Phys. J. C, 86(10), 1235–11pp.
Abstract: We study the J/psi ->Lambda pi Sigma & strns; reaction by looking at the pi+Lambda mass distribution at low energies, in search of signals for the low lying Sigma & lowast; excited states. Apart from a clear signal of the Sigma(1385)(3/2+) state, we find a smaller peak for the predicted Sigma(1430)(1/2-) , which has already been confirmed by the Belle Collaboration. A first analysis, considering only the pi Lambda interaction, shows that the low energy part of the spectrum is better reproduced including contributions from the Sigma(1430) and the predicted Sigma(1380)(1/2-) state that has been claimed before from analyses of different experiments. However, when we consider the pi Sigma & strns; interaction the need for the Sigma(1380) disappears.
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Sultan, A. M., Sabir, A. A., Olmo, G. J., & Rustam, A. (2026). Stellar structure in nonlinear f (R, T) gravity: Exact solutions via an effective fluid description. Phys. Dark Universe, 54, 102501–8pp.
Abstract: This paper investigates static, spherically symmetric stellar configurations within non-linear f (R, T) = R + )(x2T)n gravity. Due to the analytical complexity introduced by non-linear trace couplings, an effective fluid reformulation is introduced that maps the theory directly into an Einstein-like form. This framework allows for exact parametric solutions across arbitrary values of n for effective constant density fluids and quark-matter-type equations of state. For self-similar configurations, we show that solutions can be found for certain constant equation-of-state in some intervals of n. The models reveal that non-linear matter-geometry couplings alter internal pressure and energy density profiles while preserving compactness bounds closely aligned with the classical Buchdahl limit.
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Ramirez-Uribe, S., Renteria-Olivo, A. E., & Rodrigo, G. (2026). Quantum querying based on multicontrolled Toffoli gates for causal Feynman loop configurations and directed acyclic graphs. Phys. Rev. D, 114(7), 074038–19pp.
Abstract: Quantum algorithms are a promising framework for unfolding the causal configurations of multiloop Feynman diagrams, which is equivalent to querying the directed acyclic graph (DAG) configurations of undirected graphs in graph theory. In this paper, we present a quantum algorithm for querying in both types of applications, using a systematic and sparing logic in the design of an oracle operator. The construction of the quantum oracle is based exclusively on multicontrolled Toffoli (MCX) gates and quantum NOT (Pauli-X) gates. The efficiency of the algorithm is evaluated by comparison with a quantum algorithm based on binary clauses. Furthermore, we analyze the impact of traspilation and introduce an appropriate metric to assess the complexity of the algorithm, the quantum circuit area. We explicitly analyze three-, four- and five-eloop topologies, which have not previously been explored due to their higher complexity and the current limitations of quantum simulators.
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