# OpenAccess

Latest additions:
 2018-05-2311:19 [PUBDB-2018-02055] Report/Journal Article et al Search for γ -Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S. [arXiv:1805.05741] Physical review letters 120(20), 201101 (2018) [10.1103/PhysRevLett.120.201101]   Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth [...] OpenAccess: PDF PDF (PDFA); 2018-05-2310:59 [PUBDB-2018-02053] Report/Journal Article et al From the $SU(2)$ quantum link model on the honeycomb lattice to the quantum dimer model on the kagome lattice: Phase transition and fractionalized flux strings [arXiv:1712.08300] Physical review / B 97(20), 205108 (2018) [10.1103/PhysRevB.97.205108]   We consider the (2+1)-dimensional SU(2) quantum link model on the honeycomb lattice and show that it is equivalent to a quantum dimer model on the kagome lattice. The model has crystalline confined phases with spontaneously broken translation invariance associated with pinwheel order, which is investigated with either a Metropolis or an efficient cluster algorithm [...] OpenAccess: PDF PDF (PDFA); 2018-05-2310:56 [PUBDB-2018-02052] Report/Journal Article et al Strange nucleon electromagnetic form factors from lattice QCD [arXiv:1801.09581] Physical review / D 97(9), 094504 (2018) [10.1103/PhysRevD.97.094504]   We evaluate the strange nucleon electromagnetic form factors using an ensemble of gauge configurations generated with two degenerate maximally twisted mass clover-improved fermions with mass tuned to approximately reproduce the physical pion mass. In addition, we present results for the disconnected light quark contributions to the nucleon electromagnetic form factors [...] OpenAccess: PDF PDF (PDFA); 2018-05-2310:00 [PUBDB-2018-02045] Contribution to a conference proceedings et al RF Electronics for the Measurement of Beam Induced Higher Order Modes (HOM) Implemented in the MICROTCA.4 Form Factor 9th International Particle Accelerator Conference, IPAC’18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018 , 3 pp. (2018) [10.3204/PUBDB-2018-02045]   Higher order modes (HOM) excited in RF accelerating cavities by a particle beam can be used for electron beam diagnostics. Phase of a monopole HOM provides infor-mation about the beam phase relative to the externally induced RF field in a cavity (BPhM) [1] . [...] OpenAccess: PDF PDF (PDFA); 2018-05-2214:43 [PUBDB-2018-02033] Contribution to a conference proceedings/Contribution to a book et al Sub-Femtosecond Time-Resolved Measurements Based on a Variable Polarization X-Band Transverse Deflecting Structures for SwissFEL 38th International Free Electron laser Conference, FEL 2017, Santa Fe, N.M.Santa Fe, N.M., United States, 20 Aug 2017 - 25 Aug 2017 Geneva : JACoW , 491-494 (2018) [10.18429/JACoW-FEL2017-WEP040]   The SwissFEL project, under commissioning at the Paul Scherrer Institut (PSI), will produce FEL radiation for soft and hard X-rays with pulse durations ranging from a few to several tens of femtoseconds. A collaboration between DESY, PSI and CERN has been established with the aim of developing and building an advanced X-Band transverse deflector structure (TDS) with the new feature of providing variable polarization of the deflecting force. [...] OpenAccess: PDF PDF (PDFA); 2018-05-2209:49 [PUBDB-2018-02015] Journal Article/Report/Contribution to a conference proceedings Valinevich, P. A. SL(2,$\mathbb{C}$) Gustafson Integrals [DESY-17-200; arXiv:1711.07822] Elliptic Hypergeometric Functions in Combinatorics, Integrable Systems and Physics, ViennaVienna, Austria, 20 Mar 2017 - 24 Mar 2017   It was shown recently that many of the Gustafson integrals appear in studies of the SL(2,$\mathbb{R}$) spin chain models. One can hope to obtain a generalization of the Gustafson integrals considering spin chain models with a different symmetry group [...] OpenAccess: PDF PDF (PDFA); 2018-05-1823:26 [PUBDB-2018-02013] Contribution to a conference proceedings et al A PETRA IV Lattice Based on Hybrid Seven Bend Achromats 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018 , 4 pp. (2018) [10.3204/PUBDB-2018-02013]   For the PETRA IV project at DESY it is planned to convert the 6 GeV synchrotron light source PETRA III into a diffraction limited storage ring with ultra-low emittances. PETRA IV should provide a natural emittance two orders of magnitude smaller as now. [...] OpenAccess: PDF PDF (PDFA); 2018-05-1823:22 [PUBDB-2018-02012] Poster et al A PETRA IV Lattice Based on Hybrid Seven Bend Achromats 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018   For the PETRA IV project at DESY it is planned to convert the 6 GeV synchrotron light source PETRA III into a diffraction limited storage ring with ultra-low emittances. PETRA IV should provide a natural emittance two orders of magnitude smaller as now. [...] OpenAccess: PDF PDF (PDFA); 2018-05-1823:04 [PUBDB-2018-02009] Contribution to a conference proceedings et al Optimization of the Injection Kicker Bump Leakage at PETRA III 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018 , 4 pp. (2018) [10.3204/PUBDB-2018-02009]   PETRA III is a third generation synchrotron light source at DESY delivering high brightness photon beams for users at 21 beam lines. It is operated at 6 GeV with a beam current of 100 mA in top-up mode and is in operation for users since 2010. [...] OpenAccess: PDF PDF (PDFA); 2018-05-1822:48 [PUBDB-2018-02008] Poster et al Optimization of the Injection Kicker Bump Leakage at PETRA III 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018   PETRA III is a third generation synchrotron light source at DESY delivering high brightness photon beams for users at 21 beam lines. It is operated at 6 GeV with a beam current of 100 mA in top-up mode and is in operation for users since 2010. [...] OpenAccess: PDF PDF (PDFA);