OpenAccess

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2019-05-23
14:17
OpenAccess [PUBDB-2019-02359] Book/Report/Master Thesis

Systematic studies of a cavity quench localization system
[DESY-THESIS-2019-010]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 120 pp. () [10.3204/PUBDB-2019-02359] = Masterarbeit, Universität Hamburg, 2019  GO
Several tools for quench localization at Superconducting Radio Frequency cavities exist. One of these techniques uses the excitation of temperature waves in liquid Helium below the lambda point. [...]
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2019-05-21
14:21
OpenAccess [PUBDB-2019-02325] Report/Journal Article
et al
Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
[arXiv:1812.09768; CMS-B2G-17-012; CERN-EP-2018-290]
A search for the pair production of heavy vector-like partners $\mathrm {T}$ and $\mathrm {B}$ of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton–proton collisions at $\sqrt{s} = 13\,\text {Te}\text {V} $ . The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9 $\,\text {fb}^{-1}$ . [...]
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2019-05-21
14:17
OpenAccess [PUBDB-2019-02324] Report/Journal Article
et al
Measurement of the $\mathrm{t}\overline{\mathrm{t}}$ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at $\sqrt{s} =$ 13 TeV
[arXiv:1812.10505; CMS-TOP-17-001; CERN-EP-2018-317]
A measurement of the top quark–antiquark pair production cross section $\sigma _{\mathrm {t}\overline{\mathrm {t}}} $ in proton–proton collisions at a centre-of-mass energy of 13 $\,\text {Te}\text {V}$ is presented. The data correspond to an integrated luminosity of $35.9{\,\text {fb}^{-1}} $ , recorded by the CMS experiment at the CERN LHC in 2016. [...]
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2019-05-21
14:14
OpenAccess [PUBDB-2019-02323] Report/Journal Article
et al
Measurement of inclusive very forward jet cross sections in proton-lead collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV
[arXiv:1812.01691; CMS-FSQ-17-001; CERN-EP-2018-325]
Measurements of differential cross sections for inclusive very forward jet production in proton-lead collisions as a function of jet energy are presented. The data were collected with the CMS experiment at the LHC in the laboratory pseudorapidity range $-$6.6$<\eta<-$5.2. [...]
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2019-05-21
14:10
OpenAccess [PUBDB-2019-02322] Report/Journal Article
et al
Measurement of the energy density as a function of pseudorapidity in proton-proton collisions at $\sqrt{s} =$ 13 TeV
[arXiv:1812.04095; CMS-FSQ-15-006; CERN-EP-2018-308]
A measurement of the energy density in proton–proton collisions at a centre-of-mass energy of s√=13 TeV is presented. The data have been recorded with the CMS experiment at the LHC during low luminosity operations in 2015. [...]
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2019-05-21
14:00
OpenAccess [PUBDB-2019-02321] Report/Journal Article
et al
Search for an $L_{\mu}-L_{\tau}$ gauge boson using Z$\to4\mu$ events in proton-proton collisions at $\sqrt{s} =$ 13 TeV
[arXiv:1808.03684; CMS-EXO-18-008; CERN-EP-2018-208]
A search for a narrow Z$'$ gauge boson with a mass between 5 and 70 GeV resulting from an $L_{\mu}-L_{\tau}$ $U(1)$ local gauge symmetry is reported. Events containing four muons with an invariant mass near the standard model Z boson mass are analyzed, and the selection is further optimized to be sensitive to the events that may contain Z$\to$Z$'\mu\mu\to4\mu$ decays. [...]
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2019-05-20
20:52
OpenAccess [PUBDB-2019-02319] Journal Article/Contribution to a conference proceedings

Medium-indused modification of kaons spectra measured in SIDIS at HERMES
24th International Baldin Seminar on High Energy Physics Problems, ISHEPP 2018, DubnaDubna, Russia, 17 Sep 2018 - 22 Sep 20182018-09-172018-09-22 The European physical journal / Web of Conferences 204, 11002 () [10.1051/epjconf/201920411002]  GO
The predicted high sensitivity of the nuclear modification factor for K$^−$ in SIDIS due to the QCD based effect of medium-induced flavour conversion in the fragmentation function is studied at HERMES experiment. Unlike π+, π− and K$^+$ nuclear modification factor for K$^−$ is assumed to increase at high value of Bjorken variable $x_B$ and a hadron fraction energy $z$. [...]
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2019-05-20
13:29
OpenAccess [PUBDB-2019-02314] Poster

Exotic decay of the Higgs boson to a pair of light pseudoscalars in the CMS experiment
7th Conference of Large Hadron Collider Physics, LHCP2019, PueblaPuebla, Mexico, 20 May 2019 - 25 May 20192019-05-202019-05-25  GO
The Standard Model is one of the most successful theories at describing the strong, weak, and electromagnetic forces and the interactions between the elementary particles.The scalar boson discovered in 2012 at the Large Hadron Collider (LHC) might be consistent with the Higgs boson predicted by the Standard Model, thus validating the Higgs mechanism and therefore representing a further confirmation of this theoretical framework. However, the experimental data still leave plenty of room to determine whether or not an extension of the scalar sector is allowed.The LHC combination of the SM Higgs boson measurements at 7 and 8 TeV allows Higgs boson decays to BSM states with a rate of up to 34% at 95% confidence level.Presence of new physics within the context of the Two-Higgs-Double-Model and NMSSM theories allows the exotic decay of the Higgs boson into a pair of light pseudoscalars. [...]
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2019-05-16
12:47
OpenAccess [PUBDB-2019-02297] Journal Article/Contribution to a conference proceedings
et al
Strong-field physics in the molecular frame
XXI International Conference on Ultrafast Phenomena 2018, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 07002 () [10.1051/epjconf/201920507002]  GO
Laser-aligned carbonyl-sulfide molecules were strong-field ionized using mid-infrared light. Investigating the strong-field effects in the molecular frame allowed to add novel facets to the understanding of the intrinsic nature of strong-field physics..
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2019-05-16
10:47
OpenAccess [PUBDB-2019-02296] Journal Article
et al
Observation of Transverse $\mathrm{{\Lambda}}/\bar{\mathrm{{\Lambda}}}$ Hyperon Polarization in ${e}^{+}{e}^{{-}}$ Annihilation at Belle
We report the first observation of the spontaneous polarization of $Λ$ and $\bar{Λ}$ hyperons transverse to the production plane in $e^+ e^−$ annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive $Λ/\bar{Λ}$ production, we also report results with subtracted feed-down contributions from $Σ^0$ and charm [...]
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