Publications database

Latest additions:
2018-07-12
15:59
arXiv [PUBDB-2018-02593] Report/Journal Article
; ; ; et al
Study of $K_S^ 0$ pair production in single-tag two-photon collisions
[arXiv:1712.02145; Belle Preprint 2017-25, KEK Preprint 2017-36]
We report a measurement of the cross section for $K^0_S$ pair production in single-tag two-photon collisions, $\gamma^* \gamma \to K^0_S K^0_S$, for $Q^2$ up to 30 GeV$^2$, where $Q^2$ is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV < W < 2.6 GeV and $|\cos \theta^*| < 1.0$ for the total energy and kaon scattering angle, respectively, in the $\gamma^* \gamma$ center-of-mass system. [...]
Restricted: Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext
ddc:530
Detailed record - Similar records
2018-07-12
15:36
OpenAccess [PUBDB-2018-02591] Report/Journal Article
; ; ; et al
Observation of excited $\Omega_c$ charmed baryons in $e^ + e^ −$ collisions
[BELLE-PREPRINT-2017-22; KEK-PREPRINT-2017-32; arXiv:1711.07927]
Using the entire Belle data sample of 980 ${\rm fb}^{-1}$ of $e^+e^-$ collisions, we present the results of a study of excited $\Omega_c$ charmed baryons in the decay mode $\Xi_c^+K^-$. We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the $\Omega_c(3000)$ , $\Omega_c(3050)$, $\Omega_c(3066)$, and $\Omega_c(3090)$..
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext
ddc:530
Detailed record - Similar records
2018-07-12
15:17
OpenAccess [PUBDB-2018-02588] Report/Journal Article
; ; ; et al
Measurement of the $\tau$ Michel parameters $\bar{\eta}$ and $\xi\kappa$ in the radiative leptonic decay $\tau^- \rightarrow \ell^- \nu_{\tau} \bar{\nu}_{\ell}\gamma$
[arXiv:1709.08833; Belle preprint 2017-20, KEK preprint 2017-29]
We present a measurement of the Michel parameters of the $\tau$ lepton, $\bar{\eta}$ and $\xi\kappa$, in the radiative leptonic decay $\tau^- \rightarrow \ell^- \nu_{\tau} \bar{\nu}_{\ell} \gamma$ using 711~f$\mathrm{b}^{-1}$ of collision data collected with the Belle detector at the KEKB $e^+e^-$ collider. The Michel parameters are measured in an unbinned maximum likelihood fit to the kinematic distribution of $e^+e^-\rightarrow\tau^+\tau^-\rightarrow (\pi^+\pi^0 \bar{\nu}_\tau)(\ell^-\nu_{\tau}\bar{\nu}_{\ell}\gamma)$ $(\ell=e$ or $\mu)$. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext
ddc:530
Detailed record - Similar records
2018-07-12
14:27
[PUBDB-2018-02586] Review/Journal Article
; ; ; et al
Terahertzstrahlen dirigieren Elektronenpakete
Physik in unserer Zeit 49(4), 165 - 166 () [10.1002/piuz.201870406]  GO
Ultraschnelle Elektronenmikroskope und Röntgenstrahlungsquellen basieren auf beschleunigten und präzise geformten Elektronenpaketen. Unsere Gruppe am DESY konnte kürzlich zeigen, wie mit sehr hochfrequenter Strahlung im Terahertzbereich kompakte Bauelemente für die Elektronenbeschleunigung realisiert und mit leichter Abwandlung auch zur zeitlichen und räumlichen Pulsformung sowie Pulscharakterisierung verwendet werden können..
Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
ddc:530
Detailed record - Similar records
2018-07-12
13:51
OpenAccess [PUBDB-2018-02585] Preprint/Report
; ; ; et al
Search for supersymmetry in events with a $\tau$ lepton pair and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
[CMS-SUS-17-003; CERN-EP-2018-149; arXiv:1807.02048]
 GO
A search for the electroweak production of supersymmetric particles in proton-proton collisions at a center-of-mass energy of 13 TeV is presented in final states with a $\tau$ lepton pair. Both hadronic and leptonic decay modes are considered for the $\tau$ leptons. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext

Detailed record - Similar records
2018-07-11
17:56
OpenAccess [PUBDB-2018-02583] Conference Presentation
; ; ; et al
PolariX TDS - Applications at DESY
High Gradient Workshop 2018, HG2018, SINAPShanghai, SINAP, China, 4 Jun 2018 - 8 Jun 20182018-06-042018-06-08  GO
OpenAccess: PolariX_TDS_Applications_at_DESY-PDF - Download fulltextPDF Download fulltextPDF (PDFA); PolariX_TDS_Applications_at_DESY - Download fulltextPPTX;

Detailed record - Similar records
2018-07-09
15:33
[PUBDB-2018-02557] Journal Article
; ; ; et al
Iterated elliptic and hypergeometric integrals for Feynman diagrams
We calculate 3-loop master integrals for heavy quark correlators and the 3-loop quantum chromodynamics corrections to the $ρ$-parameter. They obey non-factorizing differential equations of second order with more than three singularities, which cannot be factorized in Mellin-N space either. [...]
Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
ddc:530
Detailed record - Similar records
2018-07-09
10:57
OpenAccess [PUBDB-2018-02550] Report/Internal Report

Investigation on Movements of the Photon Beam in the PETRA Beamline P03 -Untersuchungen der Strahllage des Photonen-Strahls in der PETRA Beamline P03
[DESY-M-18-02]
12 pp. () [10.3204/PUBDB-2018-02550]  GO
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-07-09
10:47
OpenAccess [PUBDB-2018-02549] Report/Internal Report
;
TLD Evaluation for the XFEL Main Linac in 2017 -TLD Auswertung 2017 für den XFEL Main Linac
[DESY-M-18-01]
53 pp. () [10.3204/PUBDB-2018-02549]  GO
Thermoluminoscense dosimeters (TLD) are installed at several positions along the XFEL main linac tunnel inside the concrete shielding of the electronics racks. They have been readout regularly in every longer shutdown. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-07-05
02:27
OpenAccess [PUBDB-2018-02527] Conference Presentation (After Call)

The fate of Little Higgs Models with LHC Run 2 Data
International Conference on High Energy Physics 2018, ICHEP 2018, SeoulSeoul, South Korea, 4 Jul 2018 - 11 Jul 20182018-07-042018-07-11  GO
Little Higgs models - which can most easily be thought of as a variant ofcomposite Higgs models - explain a light Higgs boson at 125 GeV as anpseudo-Nambu-Goldstone boson of a spontaneously broken global symmetry.The mechanism of collective symmetry breaking shifts the UV scale ofthese models to the 10 TeV scale and higher. T-parity is introduced asa discrete symmetry to remove tree-level constraints on the electroweakprecision data. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records