47 research outputs found
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery
No full textIn the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the articl
Publisher Erratum: Long-lived particle reconstruction downstream of the LHCb magnet (Eur. Phys. J. C, (2025), 85, (7), 10.1140/epjc/s10052-024-13686-6)
No full textThe original HTML-version of this article was revised. A number of typographical and editorial details were incorrectly implemented, and the Data and Code Availability Statements were wrongly given. In the abstract, line 11, the Λ symbol was boldfaced while it should have been. In page 1 there were two instances of the symbol “PP”, towards the end of the left column and the beginning of the right column, which should have been “pp”, without capitalization. At the beginning of Section 3, end of page 2 and beginning of page 3, the paragraph starting as “First, Long tracks..” and finishing with “muon chambers” was with indentation, and should not have been. In addition, it was starting as a new paragraph while it should have been started right after “in Fig. 1.”. Moreover, all sentences in this paragraph were starting with a line break while should not be. Overall, the paragraph should read as follows: “..as illustrated in Fig. 1. Long tracks traverse the full tracking system. They include hits in both the VELO and the T1–T3 stations, and optionally in TT (UT in the upgraded detector). Upstream tracks traverse only the VELO and the TT (UT) stations. They are typically produced by low momentum particles, which are bent away by the magnetic field, thus failing to reach the T1–T3 stations. Downstream tracks traverse both the TT (UT) and T1–T3 stations, but do not leave any hit in the VELO. They typically belong to decay products of long-lived particles decaying beyond the VELO, such as Λ or KS0 hadrons. VELO tracks have hits only in the VELO. They include large-angle or backward tracks, useful for the determination of the PV, as well as very low momentum tracks. T tracks have hits only in the T1–T3 stations. Similarly to Downstream tracks, they include the decay products of long-lived particles decaying far away from the PV, up to several metres. A significant fraction of tracks reconstructed in this category comes from secondary interactions with the material of the mechanical structures and back-scattering particles coming from the calorimeters and hadron shield behind the muon chambers.” In page 3, right column, line 13, “layer” should have been “layers”. In page 4, left column, lines 5–6, the J/ψ→μ+μ- decay descriptor was broken in two lines and should have been in a single line. In several places in the HTML-version the Λ and Λb0 particles were written using incorrect fonts, with the Λ symbol boldfaced and the b subscript slanted, while they both should have not been. The text justification in the caption of Figs. 13 and 22 was left and should have been full. Several figure captions used incorrect fonts for denoting the particles, inconsistently with the fonts in the main text. For example, in Fig. 2: π+π- and ψ in J/ψ were slanted and should not be; the subscripts S for KS0 and b for Λb were also slanted and should not be; the Λ symbol denoting the Λ and Λb particles were boldfaced and should not be. Captions of Figs. 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 and 27 are also affected. The Data Availability Statement in page 19 was “Data will be made available on reasonable request. [Author’s comment: The datasets generated during the current study are available from the corresponding author on reasonable request.].” and should have been “The LHCb experiment has agreed to the CERN open data policy summarised in https://opendata.cern.ch/docs/about. In particular, Level 1 data associated with this publication are made available on the CERN document server at http://cds.cern.ch/record/2908392/files/. These data contain material related to the paper that allows a reinterpretation of the results in the context of new theoretical models.” The Code Availability Statement in page 19 was “Code/software cannot be made available for reasons disclosed in the code availability statement. [Author’s comment: The code/software generated during the current study is not publicly available but is available from the corresponding author on reasonable request.].” and should have been “Specific analysis software/code used to produce the results shown in the publication is preserved within the LHCb collaboration internally and can be provided on reasonable request, provided it does not contain information that can be associated with unpublished results.” The original article has been corrected and the publisher apologizes for the inconvenience caused
Correlación de la arqueología y la historia en la porción norte del valle de México.. Anales del Instituto Nacional de Antropología e Historia. Num. 44 Tomo XV (1962) Sexta Época (1939-1966)
No full textAnales de Quauhtitlan. Versión preparada por H. Berlín y S. Rendón. Prólogo de P. Kirchhoff. México, 1947.Aubin, J. M. A. Mémoires sur la Peinture et l’Ecriture Figurative des Anciens Méxicains. (Mission Scientifique au Mexique et dans l’Amérique Centrale). Première Partie: Histoire. Paris, 1885.Barlow, R. H. The Extent of the Empire of the Acolhua-Mexica. Ibero Americana: 28. Univ. of California. Berkeley, 1949.Clavijero, F. S. Historia Antigua de México. México, 1948.Códice Ramírez. Manuscrito del siglo XVI titulado Relaciones del Origen de los Indios que habitan esta Nueva España. (Editorial Leyenda). México, 1944.Comas, J. La Antropología Física en México y Centro América. Instituto Panamericano de Geografía e Historia. Pub. 68. México, 1943.Chimalpahin, D. Anales de Domingo Francisco Muñoz Chimalpahin. Sexième et Septième Rélations (1258-1612). R. Simeon ed. París, 1889.Durán, D. Historia de los Indios de Nueva España e Islas de Tierra Firme. Editorial Nacional. México, 1951.García Cubas, A. Atlas Geográfico, Estadístico e Histórico de la República Mexicana. México, 1858.Ixtlilxochitl, F. de A. Obras Históricas. Publicadas y anotadas por Alfredo Chavero. Editorial Nacional. México, 1952.Jiménez Moreno, W. Tula y los Toltecas según las fuentes. Revista Mexicana de Estudios Antropológicos. T. V. Nos. 2 y 3. México, 1941.Jiménez Moreno, W. Síntesis de la Historia Precolonial del Valle de México. Revista Mexicana de Estudios Antropológicos. T. XIV. 1ª. Parte. México, 1954-55.Jonghe, de E. Histoire du Mexique. Journal de la Société des Américanistes de Paris. n.s. Vol. 2. París, 1905.Kirchhoff, P. Los Pueblos de la Historia Tolteca-Chichimeca: sus migraciones y parentesco. Revista Mexicana de Estudios Antropológicos. T. IV, Nos. 1 y 2. México, 1940.Martínez Marín, C. La Migración Acolhua del siglo XIII. Revista Mexicana de Estudios Antropológicos. T. XIV, la. Parte. México, 1954-55.Mayer-Oakes, W. J. A. Stratigraphic Excavation at El Risco, México. Proceedings of the American Philosophical Society. Vol. 103, No. 3. Philadelphia, 1959.Mendizabal, M. O. Los Otomíes no fueron los primeros pobladores del Valle de México. Revista Mexicana de Estudios Históricos. T. I, No. 3. México, 1927.Mendizabal, M. O. en Anales del Museo Nacional de Arqueología, Historia y Etnografía. Epoca 4, No. 4. México, 1933.Muñoz Camargo, D. Historia de Tlaxcala. Edición Alfredo Chavero. México, 1892.Noguera, E. El Horizonte Tolteca-Chichimeca. Enciclopedia Mexicana de Arte, No. 4. México, 1950.O’Neill, G. Preliminary Report on Stratigraphic excavations in the Southern Valley of Mexico. Revista Mexicana de Estudios Antropológicos. T. XIV, 2a. Parte. México, 1956-57.Orozco y Berra, M. Historia Antigua de la Conquista de México, 4 vols. y atlas. México, 1880.Palacios, E. J. Apreciación de los datos históricos y tradicionales acerca de Tenayuca. Tenayuca, Publicaciones de la Secretaría de Educación Pública. México, 1935.Piña Chán, R. Excavaciones arqueológicas en algunas cuevas de la región texcocana. Revista Mexicana de Estudios Antropológicos. T. XIV, 2a. Parte. México, 1956-57.Pomar, J. B. Relación de Texcoco. Nueva Relación de Documentos para la Historia de México. México, 1891.Sejourné, L. Informe sobre el material exhumado en Ahuizotla, Azcapotzalco. Revista Mexicana de Estudios Antropológicos. T. XIV, 2a. Parte. México, 1956-57.Tolstoy, P. Surface Survey of the Northern Valley of Mexico. Transactions of the American Philosophical Society, New Series, Vol. 58, Part 5. Philadelphia, 1958.Vaillant, G. C. A correlation of archaeological and historical sequence in the Valley of Mexico. American Anthropologist, Vol. 40, No. 4, 1938.Veytia, M. Historia Antigua de México. México, 1944
Publisher Correction: Observation of triple J/ψ meson production in proton-proton collisions
No full textIn the version of this article initially published, the first affiliation—Yerevan Physics Institute, Yerevan, Armenia—was missing from the list of author affiliations and has now been inserted in the HTML and PDF versions of the articl
Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV
No full textA search is performed for the process pp -> G* -> B-H(b) over bar/(B) over bar (H)b -> Hb (b) over bar -> b (b) over barb (b) over bar, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and B-H a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb(-1), recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of m(G*) vs. m(BH). (c) 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at √s=13 Tev
No full textResults are presented of a search for a heavy Majorana neutrino N ⠃ decaying into two same-flavor leptons ⠃ (electrons or muons) and a quark-pair jet. A model is considered in which the N ⠃ is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at & RADIC;s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138 fb-1. The data are found to be in agreement with the standard model prediction. For the process in which the N ⠃ is produced in association with a lepton, followed by the decay of the N ⠃ to a same-flavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section and branching fraction is obtained as a function of the N ⠃ mass mN ⠃ and the compositeness scale ⠄. For this model the data exclude the existence of Ne (N & mu;) for mN ⠃ below 6.0 (6.1) TeV, at the limit where mN ⠃ is equal to ⠄. For mN ⠃ N 1 TeV, values of ⠄ less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3
Preparation and characterization of composites based on poly(lactic acid)/poly(methyl methacrylate) matrix and sisal fiber bundles: The effect of annealing process
No full textThe interest on poly(lactic acid) (PLA)/poly(methyl methacrylate) (PMMA) blends has increased during the last years due to their promising properties. The novelty of the current work focuses on the preparation and characterization of biocomposites based on PLA/PMMA matrix and NaOH-treated sisal fibers. The effect of the addition of treated sisal fibers on the physico-mechanical properties of high polylactide content composites was studied. For this purpose, PLA/PMMA blend (80/20 wt%) was prepared by melt-blending and reinforced with different fiber contents. Although composites showed interesting specific tensile properties, the estimated heat deflection temperature (HDT), that is, the maximum temperature at which a polymer system can be used as a rigid material, barely increased 4°C respect to unreinforced system. After the annealing process, the HDT of the unreinforced polymer blend increased around 25°C, whereas the composites showed an increase of at least 38°C. Nonetheless, the specific tensile strength of composite decreased approximately 48% because the adhesion between fiber and polymer matrix was damaged and cracks were formed during annealing process.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was financially supported by the Basque Country Government in the frame of Elkartek “Provimat” KK-2018/00046 and PIBA19-0044 projects
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Health Disparities in Presentation, Treatment, Genomic Testing, and Outcomes of Pancreatic Cancer in Hispanic and Non-Hispanic Patients
No full textBackground: There are few conflicting results regarding the treatment and outcomes of Hispanic patients with pancreatic cancer. This study comprehensively evaluated the differences in baseline characteristics, treatments, genomic testing, and outcomes among Hispanic (H) and Non-Hispanic (NH) patients with early-stage (ES) and late-stage (LS) pancreatic cancer (PC). Methods: This is a retrospective analysis from 2013 to 2020 of 294 patients with pancreatic ductal adenocarcinoma; data collected included patient demographics, clinical characteristics, treatment regimens, response, germline and somatic genetic testing, and survival outcomes. Excluded those with insufficient data. Univariate comparisons used parametric and nonparametric tests as appropriate to evaluate for differences between H and NH groups. Fisher’s exact tests were performed to evaluate the difference in frequency. Kaplan–Meier and Cox regression analysis assessed the survival. Results: The analysis included 198 patients who had a late-stage disease and 96 patients with early-stage disease at the time of diagnosis. Among the early-stage patients, the median age at diagnosis was 60.7 years in the H versus 66.7 years in the NH (p = 0.03). No other differences were observed in baseline characteristics, treatments offered, and median overall survival (NH 25 vs. H 17.7 months, p = 0.28). Performance status, negative surgical margins, and adjuvant therapy were clinically significant and univariable with improved OS (p < 0.05), regardless of ethnicity. Hispanic patients with early pancreatic cancer were noted to be at a greater risk of death with a statistically significant hazard ratio of 3.1 (p = 0.005, 95% CI, 1.39–6.90). Among the late-stage patients, Hispanic patients with ≥ 3 predisposing risk factors for pancreatic cancer were 44% vs. 25% of NH (p = 0.006). No significant differences were noted in baseline characteristic treatments, progression-free, and median overall survivals (NH 10.0 vs. 9.2 months, p = 0.4577). In the late-stage genomic testing, germline testing performed in NH 69.4% vs. H 43.9% (p = 0.003) revealed no difference among groups. For the somatic testing, the pathogenic variants with actionable mutations were 2.5% of NH and 17.6% of H patients (p = 0.03). Conclusion: Hispanic patients with early-stage pancreatic adenocarcinoma present at a younger age and with more risk factors in the late stage. These patients have significantly lower overall survival compared to their non-Hispanic counterparts. Hispanic patients in our study were 2.9 less likely to receive germline screening and more like to have somatic genetic actionable pathogenic variants. Overall, only a minority of all patients were enrolled in a pancreatic cancer clinical trial or offered genomic testing, highlighting a critical need and missed opportunity in advancing progress and improving outcomes for this disease, mainly in the underrepresented Hispanic population. © 2023, The Author(s).Open access articleThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]
Search for dark matter particles in W+ W− events with transverse momentum imbalance in proton-proton collisions at √s = 13 TeV
No full textA search for dark matter particles is performed using events with a pair of W bosons and large missing transverse momentum. Candidate events are selected by requiring one or two leptons (l = electrons or muons). The analysis is based on proton-proton collision data collected at a center-of-mass energy of 13 TeV by the CMS experiment at the LHC and corresponding to an integrated luminosity of 138 fb−1. No significant excess over the expected standard model background is observed in the lνqq and 2l2ν final states of the W+W− boson pair. Limits are set on dark matter production in the context of a simplified dark Higgs model, with a dark Higgs boson mass above the W+W− mass threshold. The dark matter phase space is probed in the mass range 100–300 GeV, extending the scope of previous searches. Current exclusion limits are improved in the range of dark Higgs masses from 160 to 250 GeV, for a dark matter mass of 200 GeV. © The Author(s) 2024
Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in root s(NN)=5.02 TeV p+Pb collisions measured by the ATLAS experiment
No full textMeasurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using p + Pbcollision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of root sNN= 5.02 TeV. Charged particles are reconstructed over pseudorapidity |eta| < 2.3and transverse momentum between 0.1GeVand 22GeVin a dataset corresponding to an integrated luminosity of 1 mu b(-1). The results are presented in the form of chargedparticle nuclear modification factors, where the p + Pbcharged-particle multiplicities are compared between central and peripheral p + Pbcollisions as well as to charged-particle cross sections measured in ppcollisions. The p + Pbcollision centrality is characterized by the total transverse energy measured in -4.9<eta<-3.1, which is in the direction of the outgoing lead beam. Three different estimations of the number of nucleons participating in the p + Pbcollision are carried out using the Glauber model and two Glauber-Gribov colour-fluctuation extensions to the Glauber model. The values of the nuclear modification factors are found to vary significantly as a function of rapidity and transverse momentum. Abroad peak is observed for all centralities and rapidities in the nuclear modification factors for chargedparticle transverse momentum values around 3GeV. The magnitude of the peak increases for more central collisions as well as rapidity ranges closer to the direction of the outgoing lead nucleus. (C) 2016 The Author(s). Published by Elsevier B.V
