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General squark flavour mixing: constraints, phenomenology and benchmarks
https://cds.cern.ch/record/2053868
We present an extensive study of non-minimal flavour violation in the squark sector in the framework of the Minimal Supersymmetric Standard Model. We investigate the effects of multiple non-vanishing flavour-violating elements in the squark mass matrices by means of a Markov Chain Monte Carlo scanning technique and identify parameter combinations that are favoured by both current data and theoretical constraints. We then detail the resulting distributions of the flavour-conserving and flavour-violating model parameters. Based on this analysis, we propose a set of benchmark scenarios relevant for future studies of non-minimal flavour violation in the Minimal Supersymmetric Standard Model.De Causmaecker, KarenFuks, BenjaminHerrmann, BjoernMahmoudi, FarvahO'Leary, BenPorod, WernerSekmen, SezenStrobbe, NadjaMon, 21 Sep 2015 05:26:33 GMT17 Sep 2015arXiv:1509.05414https://cds.cern.ch/record/2053868['arXiv:1509.05414']arXiv:1509.05414Tools for dark matter indirect detection
https://cds.cern.ch/record/2053365
Cirelli, MarcoFri, 18 Sep 2015 04:06:22 GMT2012https://cds.cern.ch/record/2053365['']Supersymmetric branes on curved spaces and fluxes
https://cds.cern.ch/record/2051734
We discuss general supersymmetric brane configurations in flux backgrounds of string and M-theory and derive a necessary condition for the worldvolume theory to be supersymmetric on a given curved manifold. This condition resembles very much the conditions found from coupling a supersymmetric field theory to off-shell supergravity but can be derived in any dimension and for up to sixteen supercharges. Apart from the topological twist, all couplings appearing in the supersymmetry condition are linked to fluxes in the bulk. We explicitly derive the condition for D3-, M2- and M5-branes, in which case the results are also useful for constructing holographic duals to the corresponding field theories. In $N=1$ setups we compare the supersymmetry conditions to those that arise by coupling the field theory to off-shell supergravity. We find that the couplings of both old and new minimal supergravity are simultaneously realized, indicating that off-shell supergravity should be coupled via the S-multiplet of 16/16 supergravity in order to describe all supersymmetric brane theories on curved spaces.Triendl, HagenFri, 11 Sep 2015 06:16:13 GMT09 Sep 2015arXiv:1509.02926https://cds.cern.ch/record/2051734['arXiv:1509.02926']arXiv:1509.02926Stop-Catalyzed Baryogenesis Beyond the MSSM
https://cds.cern.ch/record/2051712
Non-minimal supersymmetric models that predict a tree-level Higgs mass above the Minimal Supersymmetric Standard Model (MSSM) bound are well motivated by naturalness considerations. Indirect constraints on the stop sector parameters of such models are significantly relaxed compared to the MSSM; in particular, both stops can have weak-scale masses. We revisit the stop-catalyzed electroweak baryogenesis (EWB) scenario in this context. We find that the LHC measurements of the Higgs boson production and decay rates already rule out the possibility of stop-catalyzed EWB. We also introduce a gauge-invariant analysis framework that may generalize to other scenarios in which interactions outside the gauge sector drive the electroweak phase transition.Katz, AndreyPerelstein, MaximRamsey-Musolf, Michael JWinslow, PeterFri, 11 Sep 2015 06:15:49 GMT09 Sep 2015arXiv:1509.02934https://cds.cern.ch/record/2051712['arXiv:1509.02934']arXiv:1509.02934Melting Hadrons, Boiling Quarks
https://cds.cern.ch/record/2044439
In the context of the Hagedorn temperature half-centenary I describe our understanding of the hot phases of hadronic matter both below and above the Hagedorn temperature. The first part of the review addresses many frequently posed questions about properties of hadronic matter in different phases, phase transition and the exploration of quark-gluon plasma (QGP). The historical context of the discovery of QGP is shown and the role of strangeness and strange antibaryon signature of QGP illustrated. In the second part I discuss the corresponding theoretical ideas and show how experimental results can be used to describe the properties of QGP at hadronization. Finally in two appendices I present previously unpublished reports describing the early prediction of the different forms of hadron matter and of the formation of QGP in relativistic heavy ion collisions, including the initial prediction of strangeness and in particular strange antibaryon signature of QGP.Rafelski, JohannFri, 14 Aug 2015 08:17:39 GMT13 Aug 2015arXiv:1508.03260https://cds.cern.ch/record/2044439['arXiv:1508.03260']arXiv:1508.03260Scale invariant Volkov-Akulov Supergravity
https://cds.cern.ch/record/2043299
A scale invariant Goldstino theory coupled to Supergravity is obtained as a standard supergravity dual of a rigidly scale invariant higher--curvature Supergravity with a nilpotent chiral scalar curvature. The bosonic part of this theory describes a massless scalaron and a massive axion in a de Sitter Universe.Ferrara, SPorrati, MSagnotti, AThu, 13 Aug 2015 05:44:01 GMT12 Aug 2015arXiv:1508.02939https://cds.cern.ch/record/2043299['arXiv:1508.02939']arXiv:1508.02939Fiducial cross sections for Higgs boson production in association with a jet at next-to-next-to-leading order in QCD
https://cds.cern.ch/record/2042406
We extend the recent computation of Higgs boson production in association with a jet through next-to-next-to-leading order in perturbative QCD by including decays of the Higgs boson to electroweak vector bosons. This allows us to compute fiducial cross sections and kinematic distributions including realistic selection criteria for the Higgs boson decay products. As an illustration, we present results for $pp \to H + j \to \gamma \gamma + j$ closely following the ATLAS 8 TeV analysis and for $pp \to H+ j \to W W + j \to e^+ \mu^- \nu \bar \nu + j $ in a CMS-like 13 TeV setup.Caola, FabrizioMelnikov, KirillSchulze, MarkusWed, 12 Aug 2015 05:55:30 GMT11 Aug 2015arXiv:1508.02684https://cds.cern.ch/record/2042406['arXiv:1508.02684']arXiv:1508.02684Drell-Yan Production at NNLL'+NNLO Matched to Parton Showers
https://cds.cern.ch/record/2041071
We present results for Drell-Yan production from the GENEVA Monte-Carlo framework. We combine the fully-differential NNLO calculation with higher-order resummation in the 0-jettiness resolution variable. The resulting parton-level events are further combined with parton showering and hadronization provided by PYTHIA8. The 0-jettiness resummation is carried out to NNLL', which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, inclusive observables are correct to NNLO, up to small power corrections in the resolution cutoff. Furthermore, the perturbative accuracy of 0-jet-like resummation variables is significantly improved beyond the parton shower approximation. We provide comparisons with LHC measurements of Drell-Yan production at 7 TeV from ATLAS, CMS, and LHCb. As already observed in $e^+e^-$ collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of $\alpha_s(M_Z) = 0.1135$.Alioli, SimoneBauer, Christian WBerggren, CalvinTackmann, Frank JWalsh, Jonathan RFri, 07 Aug 2015 06:58:25 GMT06 Aug 2015arXiv:1508.01475https://cds.cern.ch/record/2041071['arXiv:1508.01475']arXiv:1508.01475Putting a Stop to di-Higgs Modifications
https://cds.cern.ch/record/2041064
Pair production of Higgs bosons at hadron colliders is an enticing channel to search for new physics. New colored particles that couple strongly to the Higgs, such as those most often called upon to address the hierarchy problem, provide well motivated examples in which large enhancements of the di-Higgs rate are possible, at least in principle. However, in such scenarios the di-Higgs production rate is tightly correlated with the single Higgs production rate and, since the latter is observed to be SM-like, one generally expects that only modest enhancements in di-Higgs production are allowed by the LHC Run 1 data. We examine the contribution of top squarks (stops) in a simplified supersymmetry model to di-Higgs production and find that this general expectation is indeed borne out. In particular, the allowed deviations are typically small, but there are tuned regions of parameter space where expectations based on EFT arguments break down in which order 100% enhancements to the di-Higgs production rate are possible and are simultaneously consistent with the observed single Higgs production rates. These effects are potentially observable with the high luminosity run of the LHC or at a future hadron collider.Batell, BrianMcCullough, MatthewStolarski, DanielVerhaaren, Christopher BFri, 07 Aug 2015 06:58:23 GMT05 Aug 2015arXiv:1508.01208https://cds.cern.ch/record/2041064['arXiv:1508.01208']arXiv:1508.01208Lepton Flavour Violating top decays at the LHC
https://cds.cern.ch/record/2038308
We consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change are more restrictive than l-tau; nonetheless the top could decay to a jet $+ e \bar{\mu}$ with a branching ratio of order $10^{-3}$. We estimate that the currently available LHC data (20 inverse-fb at 8 TeV) could be sensitive to $BR(t \to e \bar{\mu}$+ jet) $ \sim 6\times 10^{-5}$, and extrapolate that 100 inverse-fb at 13 TeV could reach a sensitivity of $ \sim 1 \times 10^{-5}$.Davidson, SachaMangano, Michelangelo LPerries, StephaneSordini, ViolaTue, 28 Jul 2015 09:24:16 GMT25 Jul 2015arXiv:1507.07163https://cds.cern.ch/record/2038308['arXiv:1507.07163']arXiv:1507.07163Evanescent Effects Can Alter Ultraviolet Divergences in Quantum Gravity without Physical Consequences
https://cds.cern.ch/record/2036928
Evanescent operators such as the Gauss-Bonnet term have vanishing perturbative matrix elements in exactly D=4 dimensions. Similarly, evanescent fields do not propagate in D=4; a three-form field is in this class, since it is dual to a cosmological-constant contribution. In this Letter, we show that evanescent operators and fields modify the leading ultraviolet divergence in pure gravity. To analyze the divergence, we compute the two-loop identical-helicity four-graviton amplitude and determine the coefficient of the associated (non-evanescent) R^3 counterterm studied long ago by Goroff and Sagnotti. We compare two pairs of theories that are dual in D=4: gravity coupled to nothing or to three-form matter, and gravity coupled to zero-form or to two-form matter. Duff and van Nieuwenhuizen showed that, curiously, the one-loop conformal anomaly --- the coefficient of the Gauss-Bonnet operator --- changes under p-form duality transformations. We concur, and also find that the leading R^3 divergence changes under duality transformations. Nevertheless, in both cases the physical renormalized two-loop identical-helicity four-graviton amplitude can be chosen to respect duality. In particular, its renormalization-scale dependence is unaltered.Bern, ZviCheung, CliffordChi, Huan-HangDavies, ScottDixon, LanceNohle, JoshThu, 23 Jul 2015 06:24:12 GMT22 Jul 2015arXiv:1507.06118https://cds.cern.ch/record/2036928['arXiv:1507.06118']arXiv:1507.06118Heavy concerns about the light axino explanation of the 3.5 keV X-ray line
https://cds.cern.ch/record/2036914
An unidentified 3.5 keV line from X-ray observations of galaxy clusters has been reported recently. Although still under scrutiny, decaying dark matter could be responsible for this signal. We investigate whether an axino with a mass of 7 keV could explain the line, keeping the discussion as model independent as possible. We point out several obstacles, which were overlooked in the literature, and which make the axino an unlikely candidate.Colucci, StefanoDreiner, Herbi KStaub, FlorianUbaldi, LorenzoThu, 23 Jul 2015 06:23:03 GMT22 Jul 2015arXiv:1507.06200https://cds.cern.ch/record/2036914['arXiv:1507.06200']arXiv:1507.06200Probing the Charm Yukawa Coupling in Higgs + Charm Production
https://cds.cern.ch/record/2033432
We propose a new method to determine the coupling of the Higgs boson to charm quarks, via Higgs production in association with a charm-tagged jet: $pp\to hc$. As a first estimate, we find that at the LHC with 3000 fb$^{-1}$ it should be possible to derive a constraint of order one, relative to the SM value of the charm Yukawa coupling. As a byproduct of this analysis, we present an estimate of the exclusive $pp \to hD^{(*)}$ electroweak cross section. Within the SM, the latter turns out to be not accessible at the LHC even in the high-luminosity phase.Brivio, IlariaGoertz, FlorianIsidori, GinoMon, 13 Jul 2015 05:29:59 GMT10 Jul 2015arXiv:1507.02916https://cds.cern.ch/record/2033432['arXiv:1507.02916']arXiv:1507.02916N=4 Supersymmetric AdS5 Vacua and their Moduli Spaces
https://cds.cern.ch/record/2032655
We classify the N=4 supersymmetric AdS5 backgrounds that arise as solutions of five-dimensional N=4 gauged supergravity. We express our results in terms of the allowed embedding tensor components and identify the structure of the associated gauge groups. We show that the moduli space of these AdS vacua is of the form SU(1,m)/(U(1)x SU(m)) and discuss our results regarding holographically dual N=2 SCFTs and their conformal manifolds.Louis, JanTriendl, HagenZagermann, MarcoThu, 09 Jul 2015 06:14:09 GMT06 Jul 2015arXiv:1507.01623https://cds.cern.ch/record/2032655['arXiv:1507.01623']arXiv:1507.01623Dark matter scenarios in a constrained model with Dirac gauginos
https://cds.cern.ch/record/2031552
We perform the first analysis of Dark Matter scenarios in a constrained model with Dirac Gauginos. The model under investigation is the Constrained Minimal Dirac Gaugino Supersymmetric Standard model (CMDGSSM) where the Majorana mass terms of gauginos vanish. However, $R$-symmetry is broken in the Higgs sector by an explicit and/or effective $B_\mu$-term. This causes a mass splitting between Dirac states in the fermion sector and the neutralinos, which provide the dark matter candidate, become pseudo-Dirac states. We discuss two scenarios: the universal case with all scalar masses unified at the GUT scale, and the case with non-universal Higgs soft-terms. We identify different regions in the parameter space which fullfil all constraints from the dark matter abundance, the limits from SUSY and direct dark matter searches and the Higgs mass. Most of these points can be tested with the next generation of direct dark matter detection experiments.Goodsell, Mark DKrauss, Manuel EMüller, TobiasPorod, WernerStaub, FlorianTue, 07 Jul 2015 05:55:55 GMT03 Jul 2015arXiv:1507.01010https://cds.cern.ch/record/2031552['arXiv:1507.01010']arXiv:1507.01010Charged-Lepton Mixing and Lepton Flavor Violation
https://cds.cern.ch/record/2031545
We present a model for calculating charged-lepton mixing matrices. These matrices are an essential ingredient for predicting lepton flavor-violating rates in the lepton number nonuniversal models recently proposed to explain anomalies in B-meson decays. The model is based on work on "constrained flavor breaking" by Appelquist, Bai and Piai relating the charged-lepton mass matrix, M_l, to those for the up and down-type quarks, M_{u,d}. We use our recent model of lepton nonuniversality to illustrate the magnitudes of flavor-violating B-decay rates that might be expected. Decays with mu tau final states generally have the highest rates by far.Guadagnoli, DiegoLane, KennethTue, 07 Jul 2015 05:55:28 GMT06 Jul 2015arXiv:1507.01412https://cds.cern.ch/record/2031545['arXiv:1507.01412']arXiv:1507.01412Parton distributions with threshold resummation
https://cds.cern.ch/record/2031540
We construct a set of parton distribution functions (PDFs) in which fixed-order NLO and NNLO calculations are supplemented with soft-gluon (threshold) resummation up to NLL and NNLL accuracy respectively, suitable for use in conjunction with any QCD calculation in which threshold resummation is included at the level of partonic cross sections. These resummed PDF sets, based on the NNPDF3.0 analysis, are extracted from deep-inelastic scattering, Drell-Yan, and top quark pair production data, for which resummed calculations can be consistently used. We find that, close to threshold, the inclusion of resummed PDFs can partially compensate the enhancement in resummed matrix elements, leading to resummed hadronic cross-sections closer to the fixed-order calculation. On the other hand, far from threshold, resummed PDFs reduce to their fixed-order counterparts. Our results demonstrate the need for a consistent use of resummed PDFs in resummed calculations.Bonvini, MarcoMarzani, SimoneRojo, JuanRottoli, LucaUbiali, MariaBall, Richard DBertone, ValerioCarrazza, StefanoHartland, Nathan PTue, 07 Jul 2015 05:55:23 GMT03 Jul 2015arXiv:1507.01006https://cds.cern.ch/record/2031540['arXiv:1507.01006']arXiv:1507.01006Low Q^2 Weak Mixing Angle Measurements and Rare Higgs Decays
https://cds.cern.ch/record/2030725
A weighted average weak mixing angle theta_W derived from relatively low Q^2 experiments is compared with the Standard Model prediction obtained from precision measurements. The approximate 1.8 sigma discrepancy is fit with an intermediate mass (~ 10-35 GeV) "dark" Z boson Z_d, corresponding to a U(1)_d gauge symmetry of hidden dark matter, which couples to our world via kinetic and Z-Z_d mass mixing. Constraints on such a scenario are obtained from precision electroweak bounds and searches for the rare Higgs decays H -> Z Z_d -> 4 charged leptons at the LHC. The sensitivity of future anticipated low Q^2 measurements of sin^2 theta_W(Q^2) to intermediate mass Z_d is also illustrated. This dark Z scenario can provide interesting concomitant signals in low energy parity violating measurements and rare Higgs decays at the LHC, over the next few years.Davoudiasl, HoomanLee, Hye-SungMarciano, William JFri, 03 Jul 2015 05:52:45 GMT01 Jul 2015arXiv:1507.00352https://cds.cern.ch/record/2030725['arXiv:1507.00352']arXiv:1507.00352Isotropization and hydrodynamization in weakly coupled heavy-ion collisions
https://cds.cern.ch/record/2028649
We numerically solve 2+1D effective kinetic theory of weak coupling QCD under longitudinal expansion relevant for early stages of heavy-ion collisions. We find agreement with viscous hydrodynamics and classical Yang-Mills simulations in the regimes where they are applicable. By choosing initial conditions that are motivated by color-glass-condensate framework we find that for Q=2GeV and $\alpha_s$=0.3 the system is approximately described by viscous hydrodynamics well before $\tau \lesssim 1.0$ fm/c.Kurkela, AleksiZhu, YanFri, 26 Jun 2015 17:45:51 GMT22 Jun 2015arXiv:1506.06647https://cds.cern.ch/record/2028649['arXiv:1506.06647']arXiv:1506.06647Integrating out lattice gauge fields
https://cds.cern.ch/record/2028555
The sign problem is a major obstacle to our understanding of the phase diagram of QCD at finite baryon density. Several numerical methods have been proposed to tackle this problem, but a full solution to the sign problem is still elusive. Motivated by this problem and by recent advances in diagrammatic Monte Carlo methods, we find a new exact representation of the partition function of pure lattice gauge theory that contains no link variables. This approach can be easily extended to include staggered fermions, and results in a diagrammatic representation of fermionic states as arrangements of monomers, dimers, and fermionic loops saturating the spacetime lattice. Our representations are exact for any value of the lattice coupling, and extend previous representations that are only valid in the strong coupling limit and at $O(\beta)$. As a concrete example, we construct a monomer-dimer-loop representation of compact lattice QED.Vairinhos, Helviode Forcrand, PhilippeFri, 26 Jun 2015 15:57:41 GMT23 Jun 2015arXiv:1506.07007https://cds.cern.ch/record/2028555['arXiv:1506.07007']arXiv:1506.07007Mass anomalous dimension of Adjoint QCD at large N from twisted volume reduction
https://cds.cern.ch/record/2028551
In this work we consider the $SU(N)$ gauge theory with two Dirac fermions in the adjoint representation, in the limit of large $N$. In this limit the infinite-volume physics of this model can be studied by means of the corresponding twisted reduced model defined on a single site lattice. Making use of this strategy we study the reduced model for various values of $N$ up to 289. By analyzing the eigenvalue distribution of the adjoint Dirac operator we test the conformality of the theory and extract the corresponding mass anomalous dimension.Pérez, Margarita GarcíaGonzález-Arroyo, AntonioKeegan, LiamOkawa, MasanoriFri, 26 Jun 2015 15:57:40 GMT22 Jun 2015arXiv:1506.06536https://cds.cern.ch/record/2028551['arXiv:1506.06536']arXiv:1506.06536Inflationary magnetogenesis, derivative couplings and relativistic Van der Waals interactions
https://cds.cern.ch/record/2027889
When the gauge fields have derivative couplings to scalars, like in the case of the relativistic theory of Van der Waals (or Casimir-Polder) interactions, conformal invariance is broken but the magnetic and electric susceptibilities are not bound to coincide. We analyze the formation of large-scale magnetic fields in slow-roll inflation and find that they are generated at the level of a few hundredths of a nG and over typical length scales between few Mpc and $100$ Mpc. Using a new time parametrization that reduces to conformal time but only for coincident susceptibilities, the gauge action is quantized while the evolution equations of the corresponding mode functions are more easily solvable. The power spectra depend on the normalized rates of variation of the two susceptibilities (or of the corresponding gauge couplings) and on the absolute value of their ratio at the beginning of inflation. We pin down explicit regions in the parameter space where all the physical requirements (i.e. the backreaction constraints, the magnetogenesis bounds and the naturalness of the initial conditions of the scenario) are jointly satisfied. Weakly coupled initial data are favoured if the gauge couplings are of the same order at the end of inflation. Duality is systematically used to simplify the analysis of the wide parameter space of the model.Giovannini, MassimoFri, 26 Jun 2015 15:01:05 GMT12 Jun 2015arXiv:1506.04186https://cds.cern.ch/record/2027889['arXiv:1506.04186']arXiv:1506.04186Interplay of flavor and collider physics
https://cds.cern.ch/record/2025773
We present an overview on the interplay between direct searches for new physics at the LHC and indirect constraints from flavor physics, with an emphasis on the implications of the recent LHCb results. The complementarity with the Higgs search results will also be addressed. We show the correlations and complementarity between the different sectors in the context of a few specific scenarios in supersymmetry.Mahmoudi, FarvahWed, 17 Jun 2015 05:50:33 GMThttps://cds.cern.ch/record/2025773['']Effective field theory approach to $b\to s\ell\ell^{(\prime)}$, $B\to K^{(*)}\nu\bar{\nu}$ and $B\to D^{(*)}\tau\nu$ with third generation couplings
https://cds.cern.ch/record/2024070
LHCb reported anomalies in $B\to K^* \mu^+\mu^-$, $B_s\to\phi\mu^+\mu^-$ and $R(K)=B\to K \mu^+\mu^-/B\to K e^+e^-$. Furthermore, BaBar, BELLE and LHCb found hints for the violation of lepton flavour universality violation in $R(D^{(*)})=B\to D^{(*)}\tau\nu/B\to D^{(*)}\ell\nu$. In this note we reexamine these decays and their correlations to $B\to K^{(*)}\nu\bar{\nu}$ using gauge invariant dim-6 operators. For the numerical analysis we focus on scenarios in which new physics couples, in the interaction eigenbasis, to third generation quarks and lepton only. We conclude that such a setup can explain the $b\to s\mu^+\mu^-$ data simultaneously with $R(D^{(*)})$ for small mixing angles in the lepton sector (of the order of $\pi/16$) and very small mixing angles in the quark sector (smaller than $V_{cb}$). In these region of parameter space $B\to K^{(*)}\tau\mu$ and $B_s\to \tau\mu$ can be order $10^{-6}$. Possible UV completions are briefly discussed.Calibbi, LorenzoCrivellin, AndreasOta, ToshihikoThu, 11 Jun 2015 06:33:10 GMT08 Jun 2015arXiv:1506.02661https://cds.cern.ch/record/2024070['arXiv:1506.02661']arXiv:1506.02661Fully differential VBF Higgs production at NNLO
https://cds.cern.ch/record/2024069
We calculate the fully differential next-to-next-to-leading-order (NNLO) corrections to vector-boson fusion (VBF) Higgs production at proton colliders, in the limit in which there is no cross-talk between the hadronic systems associated with the two protons. We achieve this using a new "projection-to-Born" method that combines an inclusive NNLO calculation in the structure-function approach and a suitably factorised next-to-leading-order (NLO) VBF Higgs plus 3-jet calculation, using appropriate Higgs plus 2-parton counter events. An earlier calculation of the fully inclusive cross section had found small NNLO corrections, at the 1% level. In contrast, the cross section after typical experimental VBF cuts receives NNLO contributions of about 5-6%, while differential distributions show corrections of up to 10-12% for some standard observables. The corrections are often outside the NLO scale-uncertainty band.Cacciari, MatteoDreyer, Frédéric AKarlberg, AlexanderSalam, Gavin PZanderighi, GiuliaThu, 11 Jun 2015 06:33:09 GMT08 Jun 2015arXiv:1506.02660https://cds.cern.ch/record/2024069['arXiv:1506.02660']arXiv:1506.02660