Journal Article

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2018-02-22
15:16
[PUBDB-2018-01294] Journal Article/Contribution to a conference proceedings
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An Analysis of Longitudinal Phase Space Fragmentation at the TESLA Test Facility
22nd International Free Electron Laser Conference, FEL2000, Meeting locationDurham, USA, 13 Aug 2000 - 18 Aug 20002000-08-132000-08-18 Nuclear instruments & methods in physics research / A 475(1-3), 353 - 356 (2001) [10.1016/S0168-9002(01)01538-8]  GO
ddc:530
It has been repeatedly observed, at TTF-FEL, that the energy profile of the fully longitudinally compressed beam breaks up into peaks. In this paper we analyze a potential cause of this effect [...]
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2018-02-21
14:04
OpenAccess [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 $k_T$-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
OpenAccess [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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2018-02-21
13:33
OpenAccess [PUBDB-2018-01272] Journal Article/Contribution to a conference proceedings

Top and Electroweak Physics at the LHeC and the FCC-eh
The European Physical Society Conference on High Energy Physics, EPS-HEP2017, Meeting locationVenice, Italy, 5 Jul 2017 - 12 Jul 20172017-07-052017-07-12 Proceedings of Science (EPS-HEP2017), 464 (2018) [10.3204/PUBDB-2017-13942]  GO
ddc:530
Highlights of the rich electroweak and top quark physics program at future LHeC and FCC-eh colliders are presented. The studies involve high precision analyses of the weak mixing angle, vector and axial-vector weak neutral couplings of light quarks, the polarization asymmetry in neutral current scattering, the CKM matrix element $|V_{tb}|$ and anomalous Wtb couplings, flavor-changing neutral current tuγ couplings, and flavor-changing neutral current t → uH branching ratios [...]
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2018-02-19
23:06
[PUBDB-2018-01252] Journal Article
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Revealing the Structure and Mechanism of Palladium during Direct Synthesis of Hydrogen Peroxide in Continuous Flow Using Operando Spectroscopy
ddc:540
The direct synthesis of $H_{2}O_2$ is a dream reaction in the field of selective oxidation and green chemical synthesis. However, the unknown active state of the catalyst and the lack of a defined catalytic mechanism preclude the design and optimization of suitable catalysts and reactor setups [...]
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2018-02-19
16:04
OpenAccess [PUBDB-2018-01249] Journal Article
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Measurement of branching fractions of hadronic decays of the $\Omega_c ^{0}$ baryon
ddc:530
Using a data sample of 980  fb$^{−1}$ of $e^{+}e^{−}$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $e^{+}e^{−}$ collider, we report the results of a study of the decays of the $\Omega_c ^{0}$ charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the $\Omega_c ^{0}$ into $\Omega^{-}\pi^{+}\pi^{0},\Omega ^{-}\pi^{+}\pi^{-}\pi^{+},\Xi^{-}K^{-}\pi^{+}\pi^{+}$, and $\Xi^{0}K^{-}\pi^{+}$, as well as the first measurements of the branching fractions of the $\Omega_c ^{0}$ into $\Xi^{-}\bar{K^{0}}\pi^{+}\Xi^{0}\bar{K^{0}}$, and $\Lambda\bar{K^{0}}\bar{K^{0}}$ all with respect to the $\Omega^{-}\pi^+$ decay. [...]
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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
15:40
OpenAccess [PUBDB-2018-01234] Journal Article
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Measurement of the $\tau$ lepton polarization and $R ( D ^* )$ in the decay $\bar{B} \to D ^* \tau ^- \bar{\nu} _\tau$ with one-prong hadronic $\tau$ decays at Belle
ddc:530
With the full data sample of $772×10^6  B\bar{B}$ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay $\bar{B} \to D^{∗}\tau^{−}\nu_\tau$ is studied with the hadronic $\tau$ decays $\tau^{-} \to \tau \pi^{-}\nu_\tau$ and $\tau^{-} \to \rho^{-}\nu_\tau$. The $\tau$ polarization $P_{\tau}(D^{∗})$ in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions $R ( D ^* )$ = $\mathcal{B}(\bar{B}\to D^{∗}\tau^{−}\nu_\tau)/\mathcal{B}(\bar{B}\to D^{∗} ℓ^{-}\nu_{ℓ})$, where $ℓ^-$ denotes an electron or a muon [...]
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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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2018-02-15
16:01
OpenAccess [PUBDB-2018-01217] Journal Article
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Determination of indium content of GaAs/(In,Ga)As/(GaAs) core-shell(-shell) nanowires by x-ray diffraction and nano x-ray fluorescence
ddc:530
We present two complementary approaches to investigate the In content in GaAs/(In,Ga)As/(GaAs) core-shell-(shell) nanowire (NW) heterostructures using synchrotron radiation. The key advantage of our methodology is that NWs are characterized in their as-grown configuration, i.e., perpendicularly standing on a substrate [...]
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