2017-04-13
08:29 |
Single top polarisation as a window to new physics
/ Aguilar-Saavedra, J.A. (Granada U., Theor. Phys. Astrophys.) ; Degrande, C. (CERN) ; Khatibi, S. (IPM, Tehran)
We discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the $t$-channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polarisation is twice larger than the relative effect on the total cross section. [...]
CERN-TH-2017-013; arXiv:1701.05900.-
2017 - 9 p.
- Published in : 10.1016/j.physletb.2017.04.023
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF;
|
Detailed record - Similar records
|
2017-04-07
07:44 |
Long-range critical exponents near the short-range crossover
/ Behan, Connor (YITP, Stony Brook) ; Rastelli, Leonardo (YITP, Stony Brook) ; Rychkov, Slava (CERN ; Ecole Normale Superieure ; UPMC, Paris (main)) ; Zan, Bernardo (ITPP, Lausanne ; CERN)
The $d$-dimensional long-range Ising model, defined by spin-spin interactions decaying with the distance as the power $1/r^{d+s}$, admits a second order phase transition with continuously varying critical exponents. At $s = s_*$, the phase transition crosses over to the usual short-range universality class. [...]
YITP-SB-17-12; CERN-TH-2017-058; arXiv:1703.03430.-
2017-06-15 - 5 p.
- Published in : Phys. Rev. Lett. 118 (2017) 241601
Fulltext: PDF;
|
Detailed record - Similar records
|
2017-03-30
07:24 |
Detailed record - Similar records
|
2017-03-30
07:23 |
Detailed record - Similar records
|
2017-03-30
07:22 |
Right-handed charged currents in the era of the Large Hadron Collider
/ Alioli, S. (CERN) ; Cirigliano, V. (Los Alamos Natl. Lab., Theor. Div.) ; Dekens, W. (Los Alamos Natl. Lab., Theor. Div. ; New Mexico Consortium, Los Alamos) ; de Vries, J. (NIKHEF, Amsterdam) ; Mereghetti, E. (Los Alamos Natl. Lab., Theor. Div.)
We discuss the phenomenology of right-handed charged currents in the framework of the Standard Model Effective Field Theory, in which they arise due to a single gauge-invariant dimension-six operator. We study the manifestations of the nine complex couplings of the $W$ to right-handed quarks in collider physics, flavor physics, and low-energy precision measurements. [...]
CERN-TH-2017-043; LA-UR-17-21898; NIKHEF-2017-014; arXiv:1703.04751.-
2017-03-14 - 50 p.
- Published in : JHEP 05 (2017) 086
Fulltext: PDF;
|
Detailed record - Similar records
|
2017-03-14
16:44 |
SMD-based numerical stochastic perturbation theory
/ Dalla Brida, Mattia (Milan Bicocca U. ; INFN, Milan Bicocca) ; Lüscher, Martin (CERN ; Bern U.)
The viability of a variant of numerical stochastic perturbation theory, where the Langevin equation is replaced by the SMD algorithm, is examined. In particular, the convergence of the process to a unique stationary state is rigorously established and the use of higher-order symplectic integration schemes is shown to be highly profitable in this context. [...]
CERN-TH-2017-057; arXiv:1703.04396.-
2017 - 35 p.
- Published in : Eur. Phys. J. C 77 (2017) 308
Fulltext: PDF; Springer Open Access article: PDF;
|
Detailed record - Similar records
|
2017-03-14
16:44 |
Dispersion relation for hadronic light-by-light scattering: two-pion contributions
/ Colangelo, Gilberto (Bern U. ; U. Bern, AEC) ; Hoferichter, Martin (Washington U., Seattle ; Santa Barbara, KITP) ; Procura, Massimiliano (CERN) ; Stoffer, Peter (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP ; UC, San Diego)
In this third paper of a series dedicated to a dispersive treatment of the hadronic light-by-light (HLbL) tensor, we derive a partial-wave formulation for two-pion intermediate states in the HLbL contribution to the anomalous magnetic moment of the muon $(g-2)_\mu$, including a detailed discussion of the unitarity relation for arbitrary partial waves. We show that obtaining a final expression free from unphysical helicity partial waves is a subtle issue, which we thoroughly clarify. [...]
INT-PUB-17-009; CERN-TH-2017-041; NSF-KITP-17-036; arXiv:1702.07347.-
2017 - 70 p.
- Published in : JHEP 04 (2017) 161
Fulltext: PDF; Springer Open Access article: PDF;
|
Detailed record - Similar records
|
2017-03-14
16:44 |
Cuts from residues: the one-loop case
/ Abreu, Samuel (Freiburg U.) ; Britto, Ruth (Trinity Coll., Dublin ; IPhT, Saclay) ; Duhr, Claude (CERN ; Louvain U., CP3) ; Gardi, Einan (U. Edinburgh, Higgs Ctr. Theor. Phys. ; Edinburgh U.)
Using the multivariate residue calculus of Leray, we give a precise definition of the notion of a cut Feynman integral in dimensional regularization, as a residue evaluated on the variety where some of the propagators are put on shell. These are naturally associated to Landau singularities of the first type. [...]
CERN-TH-2017-033; CP3-17-05; Edinburgh-2017-05; FR-PHENO-2017-001; arXiv:1702.03163.-
2017-06-14 - 56 p.
- Published in : JHEP 1706 (2017) 114
Fulltext: PDF;
|
Detailed record - Similar records
|
2017-03-14
16:44 |
Thermodynamics of strongly-coupled lattice QCD in the chiral limit
/ de Forcrand, Philippe (Zurich, ETH ; CERN) ; Romatschke, Paul (Colorado U.) ; Unger, Wolfgang (Bielefeld U.) ; Vairinhos, Helvio (Zurich, ETH)
In the strong coupling limit, $n$-point functions in lattice QCD with staggered fermions can be rewritten exactly as sums over constrained configurations of monomers, dimers, and baryon loops covering the spacetime lattice. Worm algorithms provide efficient global sampling methods over such ensembles, and are particularly efficient in the chiral limit. [...]
arXiv:1701.08324; CERN-TH-2017-012.-
2017 - 7 p.
- Published in : PoS: LATTICE2016 (2017) , pp. 086
Fulltext: PDF; Published version from PoS: PDF;
In : 34th International Symposium on Lattice Field Theory, Southampton, UK, 24 - 30 Jul 2016, pp.086
|
Detailed record - Similar records
|
2017-03-10
11:06 |
Detailed record - Similar records
|
|
|