OpenAccess

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2017-12-05
14:22
OpenAccess [PUBDB-2017-12756] Journal Article
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Alignment of the CMS Tracker: Latest Results from LHC Run-II
22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP2016, Meeting locationSan Francisco, United States of America, 14 Oct 2016 - 16 Oct 20162016-10-142016-10-16 Journal of physics / Conference Series 898, 042014 (2017) [10.3204/PUBDB-2017-12756]  GO
ddc:530
The all-silicon design of the tracking system of the CMS experiment provides excellent measurements of charged-particle tracks and an efficient tagging of jets. Conditions of the CMS tracker changed repeatedly during the 2015/2016 shutdown and the 2016 data-taking period [...]

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2017-12-04
13:36
[PUBDB-2017-12741] Report/Internal Report
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Z2 Monopoles in the Standard SU(2) Lattice Gauge Theory Model
[DESY-79-022] ddc:530
The standardSU(2) lattice gauge theory model without fermions may be considered as aZ2 model with monopoles and fluctuating coupling constants. At low temperatures β−1 (=small bare coupling constant) the monopoles are confined..
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2017-12-04
13:33
OpenAccess [PUBDB-2017-12740] Report/Internal Report
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Quarkonia
[DESY-79-020]
When the J/ψ and ψ’ were discovered in fall 1974 [1] we all witnessed a dramatic and beautiful revival of the quark model [2]. The predicted new quark flavour, c = charm [3] could be added to the hadron spectroscopy by the interpretation of the new particles as c c¯ bound states. [...]

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2017-12-04
13:28
OpenAccess [PUBDB-2017-12739] Book/Report/Dissertation / PhD Thesis
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Micro-channel Cooling for Silicon Detectors
[DESY-THESIS-2017-046]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 130 pp. (2018) [10.3204/PUBDB-2017-12739] = Dissertation, Universität Hamburg, 2017  GO
Silicon tracking detectors employed in high-energy physics are located very close to the interactionpoints of the colliding particle beams. The high energetic radiation emerging from the interactioninduces defects into the silicon, downgrading the efficiency to collect the charges created by passingparticles and increasing the noise while data taking. [...]

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2017-12-04
13:19
OpenAccess [PUBDB-2017-12737] Report/Internal Report
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DORIS AT 5-GeV
[DESY-79-008]
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2017-12-04
13:02
OpenAccess [PUBDB-2017-12734] Report/Internal Report

ASYMPTOTIC FREEDOM CONSTRAINTS ON GRAND UNIFIED GAUGE THEORIES
[DESY-78-078] ddc:530
Constraints on the fermion and Higgs scalar content of grand unified gauge theories, imposed by the requirement of asymptotic freedom for the gauge couplings, are derived for models which have fermion representations with only color singlets and color triplets. The constraintnf≦16 on the numbernf of flavors of color triplet quarks in pure QCD is removed. [...]

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2017-12-04
12:46
OpenAccess [PUBDB-2017-12730] Report/Internal Report
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Final States in Nonleptonic Bottom Meson Decays
[DESY-78-067] ddc:530
We use Isospin-Statistical Models to study many body final states in the non-leptonic decays of bottom mesons in the framework of the Kobayashi-Maskawa weak current. Estimates of charge multiplicities, branching ratios and inclusive hadron momentum distributions are presented..

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2017-12-04
12:43
OpenAccess [PUBDB-2017-12729] Report/Internal Report
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QUARKONIUM
[DESY-78-066]
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2017-12-04
12:40
OpenAccess [PUBDB-2017-12728] Report/Internal Report

ON THE NUCLEON PROPAGATOR IN MESON THEORY
[DESY-78-065]
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2017-12-04
12:34
OpenAccess [PUBDB-2017-12726] Report/Internal Report
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THE TRANSVERSE MOMENTUM PROFILE OF A QUARK JET
[DESY-78-060] ddc:530
The first and second moments of the transverse momentum distribution of pions ine+e−-annihilation at fixed longitudinal momentum with respect to the jet axis are discussed, treating the hadronic final state evolving from the 2-quark system in the framework of a fireball-model. Good agreement with the published data is found. [...]

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