Reports

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2018-02-21
14:04
arXiv [PUBDB-2018-01275] Report/Journal Article
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Possible small- x effects in the Kaluza-Klein graviton and radion production at high energies
[DESY-17-038; arXiv:1612.03811] ddc:530
We study the single graviton production at the CERN LHC using the kT-factorization approach of QCD. We consider the Arkani-Hamed-Dimopoulos-Dvali scenario and Randall-Sundrum model with one warped extra dimension and derive the production amplitudes for spin-2 (Kaluza-Klein excitation of the graviton) and spin-0 (radion) states, including subsequent graviton decay into the dilepton or diphoton pairs. [...]
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2018-02-21
13:46
arXiv [PUBDB-2018-01273] Report/Journal Article
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Calculations with off-shell matrix elements, TMD parton densities and TMD parton showers
[IFJPAN-IV-2017-28; DESY-17-222; arXiv:1712.05932] ddc:530
A new calculation using off-shell matrix elements with TMD parton densities supplemented with a newly developed initial state TMD parton shower is described. The calculation is based on the KaTie package for an automated calculation of the partonic process in high-energy factorization, making use of TMD parton densities implemented in TMDlib. [...]
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2018-02-20
15:01
OpenAccess [PUBDB-2018-01266] Book/Report/Dissertation / PhD Thesis
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Measurement of $Z$-boson production cross sections at √s = 13 TeV and $t\bar{t}$ to $Z$-boson cross-section ratios with the ATLAS detector at the LHC
[DESY-THESIS-2018-004]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 196 pp. (2018) [10.3204/PUBDB-2018-01266] = Dissertation, Universität Hamburg, 2018  GO
The measurement of $Z$-boson production cross sections in $pp$ collisions at centre-of-mass energy of √s = 13 TeV is presented. Results are based on data corresponding to an integrated luminosity of 3.16 fb$^{-1}$ recorded with the ATLAS detector in 2015 at the LHC operating with the 25 ns bunch spacing configuration. [...]
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2018-02-20
11:36
arXiv [PUBDB-2018-01259] Preprint/Report
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Possible small- x effects in the Kaluza-Klein graviton and radion production at high energies
[DESY-17-038; arXiv:1612.03811] ddc:530
We study the single graviton production at the CERN LHC using the kT-factorization approach of QCD. We consider the Arkani-Hamed-Dimopoulos-Dvali scenario and Randall-Sundrum model with one warped extra dimension and derive the production amplitudes for spin-2 (Kaluza-Klein excitation of the graviton) and spin-0 (radion) states, including subsequent graviton decay into the dilepton or diphoton pairs. [...]
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2018-02-16
15:52
OpenAccess [PUBDB-2018-01235] Report/Journal Article
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Measurements of the absolute branching fractions of $\mathrm{B^ + → X _{c \bar{c}} K ^+}$ and $\mathrm{B^ + → \bar{D} ^{( * ) 0} π^ +}$ at Belle
[arXiv:1709.06108] ddc:530
We present the measurement of the absolute branching fractions of $B^{+} \to X_{c\bar{c}} K^{+}$ and $B^{+} \to \bar{D}^{(\ast) 0} \pi^{+} $ decays, using a data sample of $772\times10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. Here, $X_{c\bar{c}}$ denotes $\eta_{c}$, $J/\psi$, $\chi_{c0}$, $\chi_{c1}$, $\eta_{c}(2S)$, $\psi(2S)$, $\psi(3770)$, $X(3872)$, and $X(3915)$. [...]
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2018-02-16
13:41
OpenAccess [PUBDB-2018-01230] Report/Journal Article
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N-jettiness subtractions for g g → H at subleading power
[DESY-17-128] ddc:530
N-jettiness subtractions provide a general approach for performing fully-differential next-to-next-to-leading order (NNLO) calculations. Since they are based on the physical resolution variable N-jettiness, $\mathcal{T}$N, subleading power corrections in $\tau=\mathcal{T}$N/Q, with Q a hard interaction scale, can also be systematically computed [...]
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2018-02-14
14:46
OpenAccess [PUBDB-2018-01180] Report/Contribution to a conference proceedings

High-Energy Neutrino Astronomy: where do we stand, where do we go?
[arXiv:1711.08266]
50 years Baksan Laboratory, Meeting locationBaksan, Russia, 22 Nov 2017 - 22 Nov 20172017-11-222017-11-22 20 pp. (2017) [10.3204/PUBDB-2018-01180]  GO
With the identification of a diffuse flux of astrophysical ('cosmic') neutrinos in the TeV-PeV energy range, IceCube has opened a new window to the Universe. However, the corresponding cosmic landscape is still uncharted: so far, the observed flux does not show any clear association with known source classes. [...]
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2018-02-12
16:05
OpenAccess [PUBDB-2018-01164] Report/Journal Article
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Computing the nucleon charge and axial radii directly at $\mathrm{Q^2=0}$ in lattice QCD
[arXiv:1711.11385; DESY-17-203] ddc:530
We describe a procedure for extracting momentum derivatives of nucleon matrix elements on the lattice directly at $Q^2=0$. This is based on the Rome method for computing momentum derivatives of quark propagators. [...]
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2018-02-12
08:27
OpenAccess [PUBDB-2018-01147] Report
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Electron and photon reconstruction and performance in ATLAS using a dynamical, topological cell clustering-based approach
[ATL-PHYS-PUB-2017-022]
This note presents the reconstruction of electrons and photons in ATLAS using a dynamic,topological cell clustering-based approach. This new technique allows for improved meas-urements of electron and photon energies, particularly in situations where an electron radiatesa bremsstrahlung photon, or a photon converts to an electron-positron pair. [...]
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2018-02-10
11:20
[PUBDB-2018-01146] Report/Journal Article
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An in situ investigation of the deformation mechanisms in a β-quenched Ti-5Al-5V-5Mo-3Cr alloy
[I-20150533 EC] ddc:600
The sequence of activation of deformation mechanisms in a near-β Ti-5Al-5Mo-5V-3Cr alloy quenched from the β-field is investigated as a function of strain during uniaxial compression at 0.001 s$^{−1}$ up to $ε$ = 0.041. Bulk in situ high energy synchrotron X-ray diffraction is applied to follow continuously the evolution of the microstructure of the alloy during deformation and is complemented with metallographic analysis. [...]
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