244 citations · 1k across the 14 of their papers we have counts for
12 papers · 1 filter
Playing Tag with ANN: Boosted Top Identification with Pattern Recognition
Leandro G. Almeida, Mihailo Backovic, Mathieu Cliche +2
Many searches for physics beyond the Standard Model at the Large Hadron Collider (LHC) rely on top tagging algorithms, which discriminate between boosted hadronic top quarks and th…
Comparing and Counting Logs in Direct and Effective Methods of Resummation
Leandro G. Almeida, Stephen D. Ellis, Christopher Lee +3
We compare methods to resum logarithms in event shape distributions as they have been used in perturbative QCD directly and in effective field theory. We demonstrate that they are…
Study of the 125 GeV Standard Model Higgs Boson Partial Widths and Branching Fractions
Leandro G. Almeida, Seung J. Lee, Stefan Pokorski +1
The discovery of the Higgs boson, with mass known to better than the percent level, enables for the first time precision Higgs boson analyses. Toward this goal, we define an expans…
Does Taste like vanilla New Physics?
Leandro G. Almeida, Enrico Bertuzzo, Pedro A. N. Machado +1
We analyse the interplay between the Higgs to diphoton rate and electroweak precision measurements contraints in extensions of the Standard Model with new uncolored charged fermion…
Three-particle templates for boosted Higgs
Leandro G. Almeida, Ozan Erdoğan, José Juknevich +3
We explore the ability of three-particle templates to distinguish color neutral objects from QCD background. This method is particularly useful to identify the standard model Higgs…
Structure of Fat Jets at the Tevatron and Beyond
Leandro G. Almeida, Raz Alon, Michael Spannowsky
Boosted resonances is a highly probable and enthusiastic scenario in any process probing the electroweak scale. Such objects when decaying into jets can easily blend with the cornu…
Template Overlap Method for Massive Jets
Leandro G. Almeida, Seung J. Lee, Gilad Perez +2
We introduce a new class of infrared safe jet observables, which we refer to as template overlaps, designed to filter targeted highly boosted particle decays from QCD jets and othe…
Two-loop matching factors for light quark masses and three-loop mass anomalous dimensions in the RI/SMOM schemes
Leandro G. Almeida, Christian Sturm
Light quark masses can be determined through lattice simulations in regularization invariant momentum-subtraction(RI/MOM) schemes. Subsequently, matching factors, computed in conti…
Threshold Resummation for Di-hadron Production in Hadronic Collisions
Leandro G. Almeida, George Sterman, Werner Vogelsang
We study the resummation of large logarithmic perturbative corrections to the partonic cross sections relevant for di-hadron production in hadronic collisions, H1 H2 -> h1 h2 X, at…
Top Jets at the LHC
Leandro G. Almeida, Seung J. Lee, Gilad Perez +2
We study the reconstruction of high p_T hadronically-decaying top quarks at the LHC. The main challenge in identifying energetic top quarks is that the decay products become increa…
Substructure of high-p_T Jets at the LHC
Leandro G. Almeida, Seung J. Lee, Gilad Perez +3
We study high-pt jets from QCD and from highly-boosted massive particles such as tops, W, Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jet…
Threshold Resummation for the Top Quark Charge Asymmetry
Leandro G. Almeida, George Sterman, Werner Vogelsang
We study the QCD charge asymmetry in t\bar{t} production at the Tevatron. We investigate the role of higher orders in perturbation theory by considering the resummation of potentia…