Contributions to a conference proceedings

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2017-07-17
14:55
OpenAccess [PUBDB-2017-07774] Journal Article/Report/Contribution to a conference proceedings
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Interference effects in MSSM Higgs searches at the LHC
[DESY-17-023; arXiv:1705.06686]
38th International Conference on High Energy Physics, ICHEP 2016, Meeting locationChicago, IL, USA, 3 Aug 2016 - 10 Aug 20162016-08-032016-08-10
Proceedings of Science (ICHEP2016), 420 (2017) [10.3204/PUBDB-2017-03999]  GO
ddc:530
Complex parameters in the MSSM lead to mixing and interference between the two heavier neutral CP-even and CP-odd Higgs states. These effects can become very large in the case of almost degenerate states. [...]
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2017-07-17
14:42
OpenAccess [PUBDB-2017-07771] Journal Article/Report/Contribution to a conference proceedings
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Double parton scattering in the ultraviolet: addressing the double counting problem
[DESY-16-208; arXiv:1611.01316]
QCD Evolution Workshop 2016, QCD 2016, Meeting locationAmsterdam, Netherlands, 30 May 2016 - 3 Jun 20162016-05-302016-06-03
Proceedings of Science (QCDEV2016), 014 (2017) [10.3204/PUBDB-2017-07771]  GO
ddc:530
An important question in the theory of double parton scattering is how to incorporate the possibility of the parton pairs being generated perturbatively via 1 → 2 splitting into the theory, whilst avoiding double counting with single parton scattering loop corrections. Here, we describe a consistent approach for solving this problem, which retains the notion of double parton distributions (DPDs) for individual hadrons [...]
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2017-07-05
15:48
OpenAccess [PUBDB-2017-06951] Contribution to a conference proceedings

Very First Experience with the Standard Diagnostics at the European XFEL
8th International Particle Accelerator Conference, IPAC´17, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
180-183 (2017) [10.3204/PUBDB-2017-06951]  GO
The whole European XFEL becomes in operation this year. Dedicated standard diagnostics systems are installed and almost all types are tested at the injector before. [...]
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2017-07-05
15:31
OpenAccess [PUBDB-2017-06943] Contribution to a conference proceedings/Contribution to a book
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Installation and First Commissioning of the LLRF System for the European XFEL
8th International Particle Accelerator Conference, IPAC´17, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
3638-3641 (2017) [10.3204/PUBDB-2017-06943]  GO
The installation of the European X-ray Free Electron Laser (XFEL) is finished, leaving place for its commissioning phase. This contribution summarizes the low-level radiofrequency (LLRF) commissioning with a special emphasis on the development of automation tools to support the commissioning of such a large scale accelerator. [...]
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2017-07-04
15:31
OpenAccess [PUBDB-2017-06867] Contribution to a conference proceedings
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Experience with Single Cavity and Piezo Controls for Short, Long Pulse and CW Operation
8th International Particle Accelerator Conference, IPAC`17, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
3966-3968 (2017) [10.3204/PUBDB-2017-06867]  GO
We present a compact RF control system for superconducting radio frequency (SCRF) single cavities based on MicroTCA.4 equipped with specialized advanced mezzanine cards (AMCs) and rear transition modules (RTMs). To sense the RF signals from the cavity and to drive the high power source, a DRTM-DWC8VM1 module is used equipped with 8 analog field detectors and one RF vector modulator. [...]
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2017-07-04
14:52
OpenAccess [PUBDB-2017-06860] Contribution to a conference proceedings
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Dispersion and Beam Optic Parameter Measurements in the Transport Line (E-Weg) from DESY II To PETRA III
8th International Particle Accelerator Conference, IPAC`17, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
692-694 (2017) [10.3204/PUBDB-2017-06860]  GO
The transport line E-Weg extends from the extraction septum in DESY II to the injection septum in PETRA III, and transports electrons at a beam energy of 6.0 GeV. It consists of 3 parts. [...]
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2017-07-04
13:50
OpenAccess [PUBDB-2017-06849] Report/Contribution to a conference proceedings/Contribution to a book
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QCD Vacuum as Domain Wall Network
[DESY-PROC-2016-04]
Nedelko, Sergei N. "QCD Vacuum as Domain Wall Network" in Proceedings of the Helmholtz International Summer School 2016 (HQ 2016) : Quantum Field Theory at the Limits : from Strong Fields to Heavy Quarks / Ali, Ahmed, Blaschke, David, Issadykov, Aidos, Ivanov, Mikhail (eds.), Verlag Deutsches Elektronen-Synchrotron : 2017 ; HQ 2016 : Helmholtz International Summer School 2016, 2016-07-18 - 2016-07-30, Dubna
Quantum Field Theory at the Limits, HQ 2016, Meeting locationDubna, Russia, 18 Jul 2016 - 30 Jul 20162016-07-182016-07-30
Contributions / Info
DESY-PROC 387-391 (2017) [10.3204/DESY-PROC-2016-04/Voronin]  GO
Domain model of confinement, chiral symmetry breaking and hadronization is based on description of QCD vacuum gluon configurations as an ensemble of almost everywhere homogeneous Abelian (anti-)self-dual fields. The ensemble can be explicitly constructed as domain wall network. [...]
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2017-07-04
13:50
OpenAccess [PUBDB-2017-06848] Report/Contribution to a conference proceedings/Contribution to a book
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Critical behaviour of (2+1)-dimensional QED: $1/N$-corrections
[DESY-PROC-2016-04]
Kotikov, Anatoly V. "Critical behaviour of (2+1)-dimensional QED: $1/N$-corrections" in Proceedings of the Helmholtz International Summer School 2016 (HQ 2016) : Quantum Field Theory at the Limits : from Strong Fields to Heavy Quarks / Ali, Ahmed, Blaschke, David, Issadykov, Aidos, Ivanov, Mikhail (eds.), Verlag Deutsches Elektronen-Synchrotron : 2017 ; HQ 2016 : Helmholtz International Summer School 2016, 2016-07-18 - 2016-07-30, Dubna
Quantum Field Theory at the Limits, HQ 2016, Meeting locationDubna, Russia, 18 Jul 2016 - 30 Jul 20162016-07-182016-07-30
Contributions / Info
DESY-PROC 377-386 (2017) [10.3204/DESY-PROC-2016-04/Kotikov]  GO
We present recently obtained results for dynamical chiral symmetry breaking studied within ($2+1$)-dimensional QED with $N$ four-component fermions. The leading and next-to-leading orders of the $1/N$ expansion are computed exactly in an arbitrary non-local gauge..
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2017-07-04
13:50
OpenAccess [PUBDB-2017-06847] Report/Contribution to a conference proceedings/Contribution to a book
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LKF Transformations in QCD and Quark Propagator
[DESY-PROC-2016-04]
Aslam, M. Jamil, Gutierrez-Guerrero, L. X. "LKF Transformations in QCD and Quark Propagator" in Proceedings of the Helmholtz International Summer School 2016 (HQ 2016) : Quantum Field Theory at the Limits : from Strong Fields to Heavy Quarks / Ali, Ahmed, Blaschke, David, Issadykov, Aidos, Ivanov, Mikhail (eds.), Verlag Deutsches Elektronen-Synchrotron : 2017 ; HQ 2016 : Helmholtz International Summer School 2016, 2016-07-18 - 2016-07-30, Dubna
Quantum Field Theory at the Limits, HQ 2016, Meeting locationDubna, Russia, 18 Jul 2016 - 30 Jul 20162016-07-182016-07-30
Contributions / Info
DESY-PROC 371-376 (2017) [10.3204/DESY-PROC-2016-04/Aslam]  GO
In this article, we present the derivation of Landau-Khalatnikov-Fradkin (LKF) transformation for the quark propagator in an arbitrary $SU(N)$ gauge theory. Working in the system of covariant gauges, we derive transformation law by making perturbative expansions till ${\cal O}(g_s^6)$ and, for some terms, till ${\cal O}(g_s^8)$. [...]
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2017-07-04
13:50
OpenAccess [PUBDB-2017-06846] Report/Contribution to a conference proceedings/Contribution to a book
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The study of b-s anomaly decays in covariant quark model
[DESY-PROC-2016-04]
Issadykov, Aidos "The study of b-s anomaly decays in covariant quark model" in Proceedings of the Helmholtz International Summer School 2016 (HQ 2016) : Quantum Field Theory at the Limits : from Strong Fields to Heavy Quarks / Ali, Ahmed, Blaschke, David, Issadykov, Aidos, Ivanov, Mikhail (eds.), Verlag Deutsches Elektronen-Synchrotron : 2017 ; HQ 2016 : Helmholtz International Summer School 2016, 2016-07-18 - 2016-07-30, Dubna
Quantum Field Theory at the Limits, HQ 2016, Meeting locationDubna, Russia, 18 Jul 2016 - 30 Jul 20162016-07-182016-07-30
Contributions / Info
DESY-PROC 358-370 (2017) [10.3204/DESY-PROC-2016-04/Aidos]  GO
The work is devoted to the study of b-s anomaly decays. We compute the relevant form factors in the framework of the covariant quark model with infrared confinement in the full kinematical momentum transfer region. [...]
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