Journal Article

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2018-12-13
15:06
OpenAccess [PUBDB-2018-05453] Report/Journal Article
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Three-loop effective potential of general scalar theory via differential equations
[arXiv:1810.07476; DESY 18-173; DESY-18-173]
We consider the scalar sector of a general renormalizable theory and evaluate the effective potential through three loops analytically. We encounter three-loop vacuum bubble diagrams with up to two masses and six lines, which we solve using differential equations transformed into the favorable ϵ form of dimensional regularization. [...]
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2018-12-13
12:47
OpenAccess [PUBDB-2018-05447] Report/Journal Article
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Measurements of Higgs boson properties in the diphoton decay channel with 36 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 13$ TeV with the ATLAS detector
[arXiv:1802.04146; CERN-EP-2017-288]
Properties of the Higgs boson are measured in the two-photon final state using 36 fb$^{-1}$ of proton--protoncollision data recorded at $\sqrt{s} = 13$ TeV by the ATLAS experiment at the Large Hadron Collider. Cross-section measurements for the production of a Higgs boson through gluon--gluon fusion, vector-boson fusion, and in association with a vector bosonor a top-quark pair are reported. [...]
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2018-12-12
15:25
OpenAccess [PUBDB-2018-05437] Report/Journal Article
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The double pentaladder integral to all ordersC
[DESY-18-041; SLAC-PUB-17228; arXiv:1806.01361]
We compute dual-conformally invariant ladder integrals that are capped off by pentagons at each end of the ladder. Such integrals appear in six-point amplitudes in planar $\mathcal{N}=4$ super-Yang-Mills theory. [...]
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2018-12-12
15:15
OpenAccess [PUBDB-2018-05436] Journal Article/Report/Contribution to a conference proceedings
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Hadronic uncertainties in semileptonic $B\to K^*\mu^+\mu^-$ decays
[DESY-18-158; arXiv:1809.03789]
The International Conference on B-Physics at Frontier Machines, La BiodolaLa Biodola, Elba Island, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Proceedings of Science / International School for Advanced Studies (BEAUTY2018), 044 () [10.22323/1.326.0044]  GO
Motivated by the persisting ''anomaly'' in the measurement of $P′_5$, we review hadronic uncertainties entering the angular observables of the decay$\bar{B}\to \bar{K}^*\mu^+\mu^-$. We argue that hadronic uncertainties could account for the present measurements [...]
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2018-12-12
15:10
[PUBDB-2018-05435] Report/Journal Article
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Searches for gamma-ray lines and ‘pure WIMP’ spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.
[DESY-18-157; CERN-TH-2018-201; arXiv:1810.00995]
Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. [...]
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2018-12-12
15:05
OpenAccess [PUBDB-2018-05434] Journal Article/Report/Contribution to a conference proceedings
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Threshold resummation in the rapidity distribution for a colorless particle production at the LHC
[DESY-18-115; arXiv:1807.04583]
Loops and Legs in Quantum Field Theory, LL2018, St. GoarSt. Goar, Germany, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Proceedings of Science / International School for Advanced Studies (LL2018), 043 () [10.22323/1.303.0043]  GO
We present a formalism to resum large threshold logarithms to all orders in perturbative QCD for the rapidity distribution of any colorless particle at the hadron colliders. Using the derived resummed coefficients in two dimensional Mellin space, we present the rapidity distributions for the Higgs as well as for the Drell-Yan production to NNLO+NNLL accuracy at the LHC. [...]
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2018-12-12
13:46
[PUBDB-2018-05433] Journal Article
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Erratum: "Accurate modeling of the hose instability in plasma wakefield accelerators"
Physics of plasmas 25(7), 079902 () [10.1063/1.5046689]  GO
We would like to correct a typographical error which was introduced in Eqs. (5), (11), (14), (20a), and (20b) during revision of Ref. [...]
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2018-12-12
11:16
OpenAccess [PUBDB-2018-05423] Journal Article
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Direct measurement of focusing fields in active plasma lenses
Active plasma lenses have the potential to enable broad-ranging applications of plasma-basedaccelerators owing to their compact design and radially symmetric kT/m-level focusing fields, facilitatingbeam-quality preservation and compact beam transport. We report on the direct measurement of magneticfield gradients in active plasma lenses and demonstrate their impact on the emittance of a charged particlebeam. [...]
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2018-12-12
10:53
OpenAccess [PUBDB-2018-05417] Report/Journal Article
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Searches for heavy $ZZ$ and $ZW$ resonances in the $\ell\ell qq$ and $\nu\nu qq$ final states in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
[CERN-EP-2017-146; arXiv:1708.09638]
This paper reports searches for heavy resonances decaying into ZZ or ZW using data from proton-proton collisions at a centre-of-mass energy of $ \sqrt{s}=13 $ TeV. The data, corresponding to an integrated luminosity of 36.1 fb$^{−1}$, were recorded with the ATLAS detector in 2015 and 2016 at the Large Hadron Collider. [...]
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2018-12-11
13:14
[PUBDB-2018-05405] Journal Article
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Calibration and cross-laboratory implementation of scintillating screens for electron bunch charge determination
We revise the calibration of scintillating screens commonly used to detect relativistic electron beamswith low average current, e.g., from laser-plasma accelerators, based on new and expanded measure-ments that include higher charge density and different types of screens than previous work [Bucket al.,Rev. Sci. [...]
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