# Physical Review Letters (APS)

 2018-08-1722:17 Three-Loop Quark Jet Function / Brüser, Robin ; Liu, Ze Long ; Stahlhofen, Maximilian We calculate the massless quark jet function to three-loop order. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.072003 arXiv:1804.09722 Fulltext: XML PDF; 2018-08-1722:17 Sub-GeV Dark Matter Shining at Future MeV $\gamma$-Ray Telescopes / D’Eramo, Francesco ; Profumo, Stefano We propose a novel framework where light (sub-GeV) dark matter (DM) is detectable with future MeV $\gamma$-ray telescopes without conflicting with cosmic microwave background (CMB) data. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.071101 arXiv:1806.04745 Fulltext: XML PDF; 2018-08-1722:17 Traintracks through Calabi-Yau Manifolds: Scattering Amplitudes beyond Elliptic Polylogarithms / Bourjaily, Jacob L. ; He, Yang-Hui ; McLeod, Andrew J. ; von Hippel, Matt ; et al We describe a family of finite, four-dimensional, $L$-loop Feynman integrals that involve weight-($L+1$) hyperlogarithms integrated over ($L-1$)-dimensional elliptically fibered varieties we conjecture to be Calabi-Yau manifolds. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.071603 arXiv:1805.09326 Fulltext: XML PDF; 2018-08-1722:17 Dynamics of Finite-Temperature Conformal Field Theories from Operator Product Expansion Inversion Formulas / Petkou, Anastasios C. ; Stergiou, Andreas We apply the operator product expansion inversion formula to thermal two-point functions of bosonic and fermionic conformal field theories in general odd dimensions. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.071602 arXiv:1806.02340 Fulltext: XML PDF; 2018-08-1602:16 Observation of a New ${\Xi }_{b}^{-}$ Resonance / Aaij, R. ; Adeva, B. ; Adinolfi, M. ; Aidala, C. A. ; et al From samples of $pp$ collision data collected by the LHCb experiment at $\sqrt{s}=7$, 8 and 13 TeV, corresponding to integrated luminosities of 1.0, 2.0 and $1.5\text{}\text{}{\mathrm{fb}}^{-1}$, respectively, a peak in both the ${\Lambda }_{b}^{0}{K}^{-}$ and ${\Xi }_{b}^{0}{\pi }^{-}$ invariant mass spectra is observed. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.072002 arXiv:1805.09418 Fulltext: XML PDF; 2018-08-1602:16 Weak Decay of Magnetized Pions / Bali, G. S. ; Brandt, B. B. ; Endrődi, G. ; Gläßle, B. The leptonic decay of charged pions is investigated in the presence of background magnetic fields. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.072001 arXiv:1805.10971 Fulltext: XML PDF; 2018-08-1414:37 Search for ${B}^{-}\to {\mu }^{-}{\overline{\nu }}_{\mu }$ Decays at the Belle Experiment / Sibidanov, A. ; Varvell, K. E. ; Adachi, I. ; Aihara, H. ; et al We report the results of a search for the rare, purely leptonic decay ${B}^{-}\to {\mu }^{-}{\overline{\nu }}_{\mu }$ performed with a $711\text{}\text{}{\mathrm{fb}}^{-1}$ data sample that contains $772×{10}^{6}\text{}\text{}B\overline{B}$ pairs, collected near the $\Upsilon \left(4S\right)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{-}$ collider. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.031801 arXiv:1712.04123 Fulltext: XML PDF; 2018-08-1414:37 Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background / Pospelov, Maxim ; Pradler, Josef ; Ruderman, Joshua T. ; Urbano, Alfredo We show that, despite stringent constraints on the shape of the main part of the cosmic microwave background (CMB) spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, $\omega \ll {T}_{\mathrm{CMB}}$. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.031103 arXiv:1803.07048 Fulltext: XML PDF; 2018-08-1414:37 Quantum Chiral Higher Spin Gravity / Skvortsov, Evgeny ; Tran, Tung ; Tsulaia, Mirian An example of a higher spin gravity in four-dimensional flat space has recently been constructed by D. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.031601 arXiv:1805.00048 Fulltext: PDF XML; 2018-08-0822:16 SENSEI: First Direct-Detection Constraints on Sub-GeV Dark Matter from a Surface Run / Crisler, Michael ; Essig, Rouven ; Estrada, Juan ; Fernandez, Guillermo ; et al The Sub-Electron-Noise Skipper CCD Experimental Instrument (SENSEI) uses the recently developed Skipper-CCD technology to search for electron recoils from the interaction of sub-GeV dark matter particles with electrons in silicon. [...] Published in Physical Review Letters 121 (2018) 10.1103/PhysRevLett.121.061803 arXiv:1804.00088 Fulltext: PDF XML;