# Physical Review Letters (APS)

 2019-06-1218:16 Determinant Formula for the Octagon Form Factor in $N=4$ Supersymmetric Yang-Mills Theory / Kostov, Ivan ; Petkova, Valentina B. ; Serban, Didina We present a closed expression for the octagon form factor which appears as a building block in a class of four-point correlation functions in $N=4$ supersymmetric Yang-Mills theory considered recently by Coronado. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.231601 External links: pdf; xml 2019-06-1218:16 Holographic Signatures of Critical Collapse / Chesler, Paul M. ; Way, Benson Critical phenomena in gravitational collapse exhibit the universal features of self-similarity, critical scaling, and the appearance of a naked singularity. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.231101 External links: pdf; xml 2019-06-1218:16 Quantum Computation as Gravity / Caputa, Paweł ; Magan, Javier M. We formulate Nielsen’s geometric approach to circuit complexity in the context of two-dimensional conformal field theories, where series of conformal transformations are interpreted as “unitary circuits” built from energy-momentum tensor gates. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.231302 External links: pdf; xml 2019-06-1218:16 Fuel-Composition Dependent Reactor Antineutrino Yield at RENO / Bak, G. ; Choi, J. H. ; Jang, H. I. ; Jang, J. S. ; et al We report a fuel-dependent reactor electron antineutrino (${\overline{\nu }}_{e}$) yield using six $2.8\text{}{\mathrm{GW}}_{\mathrm{th}}$ reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.232501 External links: pdf; xml 2019-06-1202:18 Observation of an Excited ${B}_{c}^{+}$ State / Aaij, R. ; Abellán Beteta, C. ; Adeva, B. ; Adinolfi, M. ; et al Using $pp$ collision data corresponding to an integrated luminosity of $8.5\text{}\text{}{\mathrm{fb}}^{-1}$ recorded by the LHCb experiment at center-of-mass energies of $\sqrt{s}=7$, 8, and 13 TeV, the observation of an excited ${B}_{c}^{+}$ state in the ${B}_{c}^{+}{\pi }^{+}{\pi }^{-}$ invariant-mass spectrum is reported. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.232001 External links: pdf; xml 2019-06-0722:16 Constraints on the Dark Matter Interpretation $n\to \chi +{e}^{+}{e}^{-}$ of the Neutron Decay Anomaly with the PERKEO II Experiment / Klopf, M. ; Jericha, E. ; Märkisch, B. ; Saul, H. ; et al Discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the $4\sigma$ standard deviation level. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.222503 External links: pdf; xml 2019-06-0718:16 Experimental Approach to Search for Free Neutron-Antineutron Oscillations Based on Coherent Neutron and Antineutron Mirror Reflection / Nesvizhevsky, V. V. ; Gudkov, V. ; Protasov, K. V. ; Snow, W. M. ; et al An observation of neutron-antineutron oscillations ($n-\overline{n}$), which violate both $B$ and $B-L$ conservation, would constitute a scientific discovery of fundamental importance to physics and cosmology. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.221802 External links: pdf; xml 2019-06-0718:16 Hadronic $\tau$ Decays as New Physics Probes in the LHC Era / Cirigliano, Vincenzo ; Falkowski, Adam ; González-Alonso, Martín ; Rodríguez-Sánchez, Antonio We analyze the sensitivity of hadronic $\tau$ decays to nonstandard interactions within the model-independent framework of the standard model effective field theory. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.221801 External links: pdf; xml 2019-06-0522:16 Observation of a Narrow Pentaquark State, ${P}_{c}\left(4312{\right)}^{+}$, and of the Two-Peak Structure of the ${P}_{c}\left(4450{\right)}^{+}$ / Aaij, R. ; Abellán Beteta, C. ; Adeva, B. ; Adinolfi, M. ; et al A narrow pentaquark state, ${P}_{c}\left(4312{\right)}^{+}$, decaying to $J/\psi p$, is discovered with a statistical significance of $7.3\sigma$ in a data sample of ${\Lambda }_{b}^{0}\to J/\psi p{K}^{-}$ decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.222001 External links: pdf; xml 2019-06-0418:16 Numerical Results for the Lightest Bound States in $N=1$ Supersymmetric SU(3) Yang-Mills Theory / Ali, Sajid ; Bergner, Georg ; Gerber, Henning ; Montvay, Istvan ; et al The physical particles in supersymmetric Yang-Mills (SYM) theory are bound states of gluons and gluinos. [...] Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.221601 External links: pdf; xml