20190319 11:12 
[PUBDB201901605]
Report/Journal Article
Babounikau, I. ; Osland, P. ; Pankov, A. A.
Improved constraints on the mixing and mass of $Z'$ bosons from resonant diboson searches at the LHC at $\sqrt{s}=13$ TeV and predictions for Run II
[DESY18170; arXiv:1809.08933]
New neutral vector bosons Z′ decaying to charged gauge boson pairs W$^+$W$^$ are predicted in many scenarios of new physics, including models with an extended gauge sector such as E6, leftright symmetric ZLRS′ and the sequential standard model ZSSM′. For these benchmark models we calculate and present theoretical expectations for different values of the Z′ mass M2 and mixing parameter ξ. [...]
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ddc:530
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20190318 11:32 
[PUBDB201901570]
Report/Journal Article
Phan, K. H. ; Riemann, T.
Scalar 1loop Feynman integrals as meromorphic functions in spacetime dimension d
[DESY 17079, HCMUS1901, KW 18004, arXiv:1812.10975]
The longstanding problem of representing the general massive oneloop Feynman integral as a meromorphic function of the spacetime dimension d has been solved for the basis of scalar one to fourpoint functions with indices one. In 2003 the solution of difference equations in the spacetime dimension allowed to determine the necessary classes of special functions: selfenergies need ordinary logarithms and Gauss hypergeometric functions $_{2}F_1$, vertices need additionally Kampé de FérietAppell functions $F_1$, and box integrals also LauricellaSaran functions $F_S$ [...]
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ddc:530
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20190314 15:57 
[PUBDB201901551]
Preprint/Report
Blümlein, J. ; Maier, A. M. ; Marquard, P.
FiveLoop Static Contribution to the Gravitational Interaction Potential of Two Point Masses
[arXiv:1902.11180; DESY19029; DOTH19/01]
We compute the static contribution to the gravitational interaction potential of two point masses in the velocityindependent fiveloop (and 5th postNewtonian) approximation to the harmonic coordinates effective action in a direct calculation. The computation is performed using effective field methods based on Feynman diagrams in momentumspace in $d = 3  2\varepsilon$ space dimensions. [...]
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20190314 15:55 
[PUBDB201901550]
Preprint/Report
Andersen, J. R. ; Hapola, T. ; Heil, M. ; et al
HEJ 2: High Energy Resummation for Hadron Colliders
[arXiv:1902.08430; DESY19028; IPPP/19/13; MCnet1905]
We present HEJ 2, a new implementation of the High Energy Jets formalism for highenergy resummation in hadroncollider processes as a flexible Monte Carlo event generator. In combination with a conventional fixedorder event generator, HEJ 2 can be used to obtain greatly improved predictions for a number of phenomenologically important processes by adding allorder logarithmic corrections in $\hat{s}/p_\perp^2$. [...]
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20190314 15:26 
[PUBDB201901546]
Preprint/Report
Caselle, M. ; Nada, A. ; Panero, M. ; et al
Conformal field theory and the hot phase of threedimensional U(1) gauge theory
[arXiv:1903.00491; DESY19027]
We study the hightemperature phase of compact U(1) gauge theory in 2+1 dimensions, comparing the results of lattice calculations with analytical predictions from the conformalfieldtheory description of the lowtemperature phase of the bidimensional XY model. We focus on the twopoint correlation functions of probe charges and the fieldstrength operator, finding excellent quantitative agreement with the functional form and the continuously varying critical indices predicted by conformal field theory..
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20190314 13:47 
[PUBDB201901539]
Report/Journal Article
Kramer, G. ; Spiesberger, H.
$\Lambda_b^0$baryon production in pp collisions in the generalmass variableflavournumber scheme and comparison with CMS and LHCb data
[DESY18036; arXiv:1803.11103; MITP18020]
We calculate the nexttoleadingorder cross section for the inclusive production of $\Lambda_b$ baryons in pp collisions in the generalmass variableflavornumber scheme. We use realistic evolved nonperturbative fragmentation functions obtained from fits to Bmeson production in $e^+ e^$ annihilation and compare our results for transversemomentum and rapidity distributions with recent experimental data from the CMS and the LHCb collaborations at the CERN LHC. [...]
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20190314 11:38 
[PUBDB201901537]
Report/Journal Article
Blümlein, J. ; De Freitas, A. ; Raab, C. G. ; et al
The $O(\alpha^2)$ Initial State QED Corrections to $e^+e^$ Annihilation to a Neutral Vector Boson Revisited
[arXiv:1901.08018; DESY18226; DOTH1830]
We calculate the nonsinglet, the pure singlet contribution, and their interference term, at $O(\alpha^2)$ due to electronpair initial state radiation to $e^+ e^$ annihilation into a neutral vector boson in a direct analytic computation without any approximation. The correction is represented in terms of iterated incomplete elliptic integrals. [...]
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20190305 14:46 
[PUBDB201901335]
Preprint/Report
Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; et al
Pseudorapidity distributions of charged hadrons in xenonxenon collisions at $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV
[arXiv:1902.03603; CMSHIN17006; CERNEP2018294]
Measurements of the pseudorapidity distributions of charged hadrons produced in xenonxenon collisions at a nucleonnucleon centreofmass energy of $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV are presented. The measurements are based on data collected by the CMS experiment at the LHC. [...]
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20190305 14:29 
[PUBDB201901334]
Preprint/Report
Aaboud, M. ; Aad, G. ; Abbott, B. ; et al
Combinations of singletopquark production crosssection measurements and $f_{\rm LV}V_{tb}$ determinations at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS experiments
[arXiv:1902.07158; CERNEP2019005]
This paper presents the combinations of singletopquark production crosssection measurements by the ATLAS and CMS Collaborations, using data from LHC protonproton collisions at $\sqrt{s}=7$ and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb$^{1}$ at $\sqrt{s}=7$ TeV, and 12.2 to 20.3 fb$^{1}$ at $\sqrt{s}=8$ TeV. These combinations are performed per centreofmass energy and for each production mode: $t$channel, $tW$, and $s$channel. [...]
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20190304 14:54 
[PUBDB201901323]
Report
ATLAS Collaboration ; CMS Collaboration
Report on the Physics at the HLLHC and Perspectives for the HELHC
[arXiv:1902.10229; CERNLPCC201901; CMSFTR19001; ATLPHYSPUB2019006]
Manuscript of volume 2 of the Yellow Report on the 'Workshop on the Physics of HLLHC and perspectives at HELHC' containing the notes produced by the ATLAS and CMS collaborations as input to the Yellow Report volume 1..
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