CERN Accelerating science

TH Preprints

Ultimi arrivi:
2015-04-01
07:57
Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in gluon fusion / Caola, Fabrizio (CERN) ; Henn, Johannes M (Princeton U.) ; Melnikov, Kirill (Karlsruhe, Inst. Technol) ; Smirnov, Alexander V (Lomonosov Moscow State U.) ; Smirnov, Vladimir A (SINP, Moscow)
We compute the part of the two-loop virtual amplitude for the process $gg \to V_1 V_2 \to (l_1 \bar l'_{1}) (l_2 \bar l'_2)$, where $V_{1,2}$ are arbitrary electroweak gauge bosons, that receives contributions from loops of massless quarks. [...]
arXiv:1503.08759 ; TTP15-013 ; CERN-PH-TH-2015-069.
- 2015. - 15 p.
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2015-04-01
07:57
Effective operators in SUSY, superfield constraints and searches for a UV completion / Dudas, E (Ecole Polytechnique, CPHT ; DESY) ; Ghilencea, D M (CERN ; Bucharest, IFIN-HH)
We discuss the role of a class of higher dimensional operators in 4D N=1 supersymmetric effective theories. [...]
arXiv:1503.08319 ; CERN-PH-TH-2015-048 ; CPHT-RR-008.0315.
- 2015. - 30 p.
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2015-04-01
07:52
Phenomenological Aspects of No-Scale Inflation Models / Ellis, John (King’s Coll. London ; CERN) ; Garcia, Marcos A G (Minnesota U.) ; Nanopoulos, Dimitri V (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A (Minnesota U.)
We discuss phenomenological aspects of no-scale supergravity inflationary models motivated by compactified string models, in which the inflaton may be identified either as a K\"ahler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index $n_s$ and the tensor-to-scalar ratio $r$ that are similar to the Starobinsky model. [...]
arXiv:1503.08867 ; KCL-PH-TH-2015-14 ; LCTS-2015-06 ; CERN-PH-TH-2015-064 ; ACT-03-15 ; UMN-TH-3426-15 ; FTPI-MINN-15-12.
- 2015. - 41 p.
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2015-04-01
07:52
Non-linear curvature inhomogeneities and backreaction for relativistic viscous fluids / Giovannini, Massimo (CERN ; INFN, Milan)
The non-perturbative curvature inhomogeneities induced by relativistic viscous fluids are not conserved in the large-scale limit. [...]
arXiv:1503.08739 ; CERN-PH-TH-2015-068.
- 2015. - 25 p.
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2015-03-30
07:41
QCD phase diagram from the lattice at strong coupling / de Forcrand, Philippe (ETH, Zurich ; CERN) ; Philipsen, Owe (Frankfurt U.) ; Unger, Wolfgang (Frankfurt U.)
The phase diagram of lattice QCD in the strong coupling limit can be measured in the full $\mu$-$T$ plane, also in the chiral limit. [...]
arXiv:1503.08140 ; CERN-PH-TH-2015-067.
- 2015. - 9 p.
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2015-03-27
07:41
Semiclassical S-matrix for black holes / Bezrukov, Fedor (CERN ; Connecticut U. ; RIKEN BNL) ; Levkov, Dmitry (Moscow, INR) ; Sibiryakov, Sergey (CERN ; Moscow, INR ; Ecole Polytechnique, Lausanne)
We propose a semiclassical method to calculate S-matrix elements for two-stage gravitational transitions involving matter collapse into a black hole and evaporation of the latter. [...]
arXiv:1503.07181 ; INR-TH-2015-007 ; CERN-PH-TH-2015-063.
- 2015. - 39 p.
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2015-03-25
18:35
Cross-Order Integral Relations from Maximal Cuts / Johansson, Henrik ; Kosower, David A ; Larsen, Kasper J ; Sogaard, Mads
We study the ABDK relation using maximal cuts of one- and two-loop integrals with up to five external legs. [...]
arXiv:1503.06711 ; CERN-PH-TH-2014-262 ; NORDITA-2014-141 ; UUITP-20-14 ; CALT-TH--2015--014 ; SACLAY IPHT--T14-239 ; NIKHEF-2014-051.
- 2015. - 58 p.
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2015-03-25
18:31
Gluino Coannihilation Revisited / Ellis, John (King's Coll. London ; CERN) ; Luo, Feng (CERN) ; Olive, Keith A (Minnesota U. ; Minnesota U., Theor. Phys. Inst.)
Some variants of the MSSM feature a strip in parameter space where the lightest neutralino is identified as the lightest supersymmetric particle (LSP), the gluino is the next-to-lightest supersymmetric particle (NLSP) and is nearly degenerate with the LSP, and the relic cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the gluino NLSP. [...]
arXiv:1503.07142 ; KCL-PH-TH-2015-12 ; LCTS-2015-04 ; CERN-PH-TH-2015-049 ; UMN--TH--3424-15 ; FTPI--MINN--15-10.
- 2015. - 35 p.
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2015-03-25
18:10
Matching NLO QCD with parton shower in Monte Carlo scheme - the KrkNLO method / Jadach, S (Cracow, INP) ; Placzek, W (Jagiellonian U.) ; Sapeta, S (CERN) ; Siodmok, A (Cracow, INP ; CERN) ; Skrzypek, M (Cracow, INP)
A new method of including the complete NLO QCD corrections to hard processes in the LO parton-shower Monte Carlo (PSMC) is presented. [...]
arXiv:1503.06849 ; IFJPAN-IV-2015-1 ; CERN-PH-TH-2015-061 ; MCNET-15-06.
- 2015. - 43 p.
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2015-03-25
18:10
Higgs boson gluon-fusion production in N3LO QCD / Anastasiou, Charalampos (Zurich, ETH) ; Duhr, Claude (CERN ; Louvain U., CP3) ; Dulat, Falko (Zurich, ETH) ; Herzog, Franz (NIKHEF, Amsterdam) ; Mistlberger, Bernhard (Zurich, ETH)
We present the cross-section for the production of a Higgs boson at hadron-colliders at next-to- next-to-next-to-leading order (N3LO) in perturbative QCD. [...]
arXiv:1503.06056 ; CERN-PH-TH-2015-055 ; CP3-15-07.
- 2015. - 5 p.
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