Combined measurements of Higgs boson couplings in proton- proton collisions at v s=13TeV

Combined measurements of the production and decay rates of the Higgs boson, as well as its couplings to vector bosons and fermions, are presented. The analysis uses the LHC proton-proton collision data set recorded with the CMS detector in 2016 at fb-1. The combination is based on analyses targeting the five main Higgs boson production mechanisms (gluon fusion, vector boson fusion, and associated production with a W or Z boson, or a top quark-antiquark pair) and the following decay modes: H, ZZ, WW, , bb, and . Searches for invisible Higgs boson decays are also considered. The best-fit ratio of the signal yield to the standard model expectation is measured to be =1.17 +/- 0.10, assuming a Higgs boson mass of 125.09. Additional results are given for various assumptions on the scaling behavior of the production and decay modes, including generic parametrizations based on ratios of cross sections and branching fractions or couplings. The results are compatible with the standard model predictions in all parametrizations considered. In addition, constraints are placed on various two Higgs doublet models.Peer reviewe

Measurement of prompt D-0 and D-0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at root S-NN=5.02 TeV

SCOAP

Search for long-lived particles decaying to leptons with large impact parameter in proton-proton collisions at root s=13 TeV

A search for new long-lived particles decaying to leptons using proton–proton collision data produced by the CERN LHC at s√=13TeV is presented. Events are selected with two leptons (an electron and a muon, two electrons, or two muons) that both have transverse impact parameter values between 0.01 and 10cm and are not required to form a common vertex. Data used for the analysis were collected with the CMS detector in 2016, 2017, and 2018, and correspond to an integrated luminosity of 118 (113)fb−1 in the ee channel (eμ and μμ channels). The search is designed to be sensitive to a wide range of models with displaced eμ, ee, and μμ final states. The results constrain several well-motivated models involving new long-lived particles that decay to displaced leptons. For some areas of the available phase space, these are the most stringent constraints to date

Lupinus montanus: chemical characterization of organs

Introduction Lupinus montanus is a herbaceous perennial plant found in pine and oak forests between 2500 and 4100 meters above sea level and flowers blooms between May and September. It is widely diffused in all Mexico and populations were found between the south of United States of America until Guatemala. It is well known that L. montanus produce quinolizidine alkaloids as part of a defence strategy against herbivores. However, very few is know about the presence of other compounds. Aim of present work was to obtain a chemical profile of L. montanus with special focus on flavonoids, alkaloids and proteins. Methods Plants and seeds of L. montanus were collected in the Iztaccihuatl volcano slope (N 19\ub0 04\u2019 58,7\u201d ; W 0,98\ub0 39\u2019 35,7\u201d) at 3581 m above sea level. Biological material was air-dried at 50\ua0\ub0C. For proximal analysis, seeds were manually separated and milled. The flour was analysed for fat, ash and crude protein using the AOAC (1990) methods. For the analysis of flavonoid, leaf, thallus, root and flower sample was extracted with methanol and analysed by HPLC and NMR. Alkaloids were extracted following the classical protocol of Wink (1995).Results and discussion/conclusions The proximal analysis showed that seeds present 15,5% fat, 40,7 % protein, 2,5 % of ashes. Methanol extract of leaf, thallus, root and flower was analyzed by HPLC and NMR, showing that flavonoids are found in every part of the plant, but specially in leaves, where acacetine, apigenine (and their glycosides), orientine, luteoline (and their glycosides, vitexine, 3\u2019 hidroxyvitexine and some other unidentified flavonoids were found. Alkaloid extracts of leaf, thallus, root and flower were analyzed by GC-MS. Leaf is the organ where got the higher diversity of alkaloids and seeds is the part with the highest concentration. Classical profile was found, with quinolizidine alkaloids like sparteine, isosparteine, lupanine, dehydrolupanine and two new compounds undescribed for L.montanus,hexa (methoxymethyl) melamine and sophocarpine. Financial Support: SIP-IPN (20110739), Erasmus-Mundus Program and CONACyT (100808)

Study of quark and gluon jet substructure in Z plus jet and dijet events from pp collisions

Measurements of jet substructure describing the composition of quark- and gluon-initiated jets are presented. Proton-proton (pp) collision data at √ s = 13 TeV collected with the CMS detector are used, corresponding to an integrated luminosity of 35.9 fb−1 . Generalized angularities are measured that characterize the jet substructure and distinguish quark- and gluon-initiated jets. These observables are sensitive to the distributions of transverse momenta and angular distances within a jet. The analysis is performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter. Each measurement is repeated applying a “soft drop” grooming procedure that removes soft and large angle radiation from the jet. Using these measurements, the ability of various models to describe jet substructure is assessed, showing a clear need for improvements in Monte Carlo generators

Search for a right-handed W boson and a heavy neutrino in proton-proton collisions at root s=13 TeV

A search is presented for a right-handed W boson (WR) and a heavy neutrino (N), in a final state consisting of two same-flavor leptons (ee or μμ) and two quarks. The search is performed with the CMS experiment at the CERN LHC using a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 138 fb−1. The search covers two regions of phase space, one where the decay products of the heavy neutrino are merged into a single large-area jet, and one where the decay products are well separated. The expected signal is characterized by an excess in the invariant mass distribution of the final-state objects. No significant excess over the standard model background expectations is observed. The observations are interpreted as upper limits on the product of WR production cross sections and branching fractions assuming that couplings are identical to those of the standard model W boson. For N masses mN equal to half the WR mass mWR (mN = 0.2 TeV), mWR is excluded at 95% confidence level up to 4.7 (4.8) and 5.0 (5.4) TeV for the electron and muon channels, respectively. This analysis provides the most stringent limits on the WR mass to date