31 research outputs found

    Measurements of differential production cross sections for a Z boson in association with jets in pp collisions at root s=8 TeV

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    Charged-particle nuclear modification factors in PbPb and pPb collisions at √=sNN=5.02 TeV

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    The spectra of charged particles produced within the pseudorapidity window |η| < 1 at √ sNN = 5.02 TeV are measured using 404 µb −1 of PbPb and 27.4 pb−1 of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0.5 < pT < 400 GeV in pp and 0.7 < pT < 400 GeV in PbPb collisions. The corresponding nuclear modification factor, RAA, is measured in bins of collision centrality. The RAA in the 5% most central collisions shows a maximal suppression by a factor of 7–8 in the pT region of 6–9 GeV. This dip is followed by an increase, which continues up to the highest pT measured, and approaches unity in the vicinity of pT = 200 GeV. The RAA is compared to theoretical predictions and earlier experimental results at lower collision energies. The newly measured pp spectrum is combined with the pPb spectrum previously published by the CMS collaboration to construct the pPb nuclear modification factor, RpA, up to 120 GeV. For pT > 20 GeV, RpA exhibits weak momentum dependence and shows a moderate enhancement above unity

    Tolerância de maçã 'Gala' a baixas temperaturas durante o armazenamento Tolerance of 'Gala' apple to low temperature during storage

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    O presente trabalho foi desenvolvido com o objetivo de avaliar a tolerância de maçãs 'Gala' a temperaturas baixas, em diferentes períodos, durante o armazenamento. Os tratamentos avaliados foram as temperaturas de 0 (padrão); -0,8 e -1,6&deg;C, durante quatro meses de armazenamento refrigerado (AR) e durante oito meses em atmosfera controlada (AC) a 1,0kPa de O2 + 2,0kPa de CO2; e de combinação dessas temperaturas por diferentes períodos de tempo no início ou no final do armazenamento. Observando os resultados, as temperaturas de 0 e 0,8&deg;C proporcionaram melhor qualidade aos frutos em relação a -1,6&deg;C, em AR. Em AC, a qualidade dos frutos foi superior em 0&deg;C, em comparação com as temperaturas de 0,8 e -1,6&deg;C. As temperaturas de -1,6&deg;C, para o AR, e de -0,8 e -1,6&deg;C, para AC, quando aplicadas no início do armazenamento, foram mais prejudiciais à qualidade dos frutos do que seu uso no período final de armazenamento, provocando, principalmente, degenerescência interna, dano externo e podridões.<br>This research was carried out to evaluate the tolerance of 'Gala' apples to low temperatures in different periods during storage. The treatments were the temperature of 0&deg;C (standard); -0.8&deg;C and -1.6&deg;C, during 4 months in cold storage and during 8 months in CA storage at 1,0kPa of O2 + 2,0kPa of CO2, and combinations of these temperatures with different times in the beginning or in the end of the storage period. Observing the results, the temperatures of 0&deg;C e -0.8&deg;C showed better quality than in -1.6oC after 4 months of cold storage. AC fruit quality was higher in 0&deg;C when compared with -0.8&deg;C and -1.6&deg;C. The temperatures of -1.6&deg;C for cold storage and of -0.8&deg;C and -1.6&deg;C for controlled atmosphere storage, when used in the beginning of storage period were more damaging to quality than in the end of storage, causing mainly internal breakdown, injury of peel and decay

    Search for heavy neutrinos or third-generation leptoquarks in final states with two hadronically decaying tau leptons and two jets in proton-proton collisions at root s=13 TeV

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    Combined analysis of νμ disappearance and νμ →νe appearance in MINOS using accelerator and atmospheric neutrinos

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    We report on a new analysis of neutrino oscillations in MINOS using the complete set of accelerator and atmospheric data. The analysis combines the νμ disappearance and νe appearance data using the three-flavor formalism. We measure |Δm322|=[2.28-2.46]×10-3eV2 (68% C.L.) and sin2θ23=0.35-0.65 (90% C.L.) in the normal hierarchy, and |Δm322|=[2.32-2.53]×10-3eV2 (68% C.L.) and sin2θ23=0.34-0.67 (90% C.L.) in the inverted hierarchy. The data also constrain δCP, the θ23 octant degeneracy and the mass hierarchy; we disfavor 36% (11%) of this three-parameter space at 68% (90%) C.L. © 2014 American Physical Society

    Search for Sterile Neutrinos in MINOS and MINOS+ Using a Two-Detector Fit

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    A search for mixing between active neutrinos and light sterile neutrinos has been performed by looking for muon neutrino disappearance in two detectors at baselines of 1.04 and 735 km, using a combined MINOS and MINOS+ exposure of 16.36×1020 protons on target. A simultaneous fit to the charged-current muon neutrino and neutral-current neutrino energy spectra in the two detectors yields no evidence for sterile neutrino mixing using a 3+1 model. The most stringent limit to date is set on the mixing parameter sin2θ24 for most values of the sterile neutrino mass splitting Δm412&gt;10-4 eV2. © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the &quot;https://creativecommons.org/licenses/by/4.0/&quot; Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article&apos;s title, journal citation, and DOI. Funded by SCOAP 3
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