A
bstract
We present a parton-level study of electro-weak production of vector-boson pairs at the Large Hadron Collider, establishing the sensitivity to a set of dimension-six operators in the ...Standard Model Effective Field Theory (SMEFT). Different final states are statistically combined, and we discuss how the orthogonality and interdependence of different analyses must be considered to obtain the most stringent constraints. The main novelties of our study are the inclusion of SMEFT effects in non-resonant diagrams and in irreducible QCD backgrounds, and an exhaustive template analysis of optimal observables for each operator and process considered. We also assess for the first time the sensitivity of vector-boson-scattering searches in semileptonic final states.
The CMS collaboration is building the high-granularity calorimeter (HGCAL) for the endcap regions as part of its planned upgrade for the High-Luminosity LHC (HL-LHC). The calorimeter data will form ...part of the Level-1 trigger (L1T) of the CMS experiment, reducing the event rate from the nominal 40 MHz down to 750 kHz with a latency of 12.5 microseconds. Among the 6 million readout channel of this 5D imaging calorimeter, 1 million "trigger channels" are read at 40 MHz, presenting a significant challenge in terms of data processing for the back-end trigger primitive system. The amount of data produced scales up to 50 Tb/s, an order of magnitude above what is currently handled at CMS. The HGCAL trigger primitive generation (TPG) system is organized in 2 stages: the first stage receiving the front-end data and organizing them into a Time-Multiplexed fashion before transmitting them to the second processing stage, where the data associated with a 120-degree sector of the HGCAL are used to reconstruct particle associated showers in a full depth 3D view. The system is instrumented with 63 ATCA electronic boards equipped with Xilinx Ultrascale FPGAs and SoC controllers, as well as high-speed optical links (16 Gb/s). We present here the technological challenge of implementing such a system and designing the firmware used in reconstructing 3D clusters. Together with tracking information, which will also be available at L1T, particle-flow reconstruction techniques and other sophisticated machine learning approach can be contemplated. We present here the HGCAL TPG system architecture design and the ongoing developments, prototyping and testing. Outlook towards modern technological approach to large data volume processing will be discussed.
Characterization of maize [Zea mays] defective kernel (dek) mutants affecting seed germination Racchi, M.L; Chiusi, A.P. (Florence Univ. (Italy). Dipartimento di Biologia Vegetale); Manzocchi, L.A. (Consiglio Nazionale delle Ricerche, Milan (Italy). Istituto per le Biosintesi Vegetali nelle Piante di Interesse Agrario) ...
Maydica,
(1996), Letnik:
41, Številka:
4
Journal Article
A group of maize defective kernel (dek) mutants, defective in embryo and endosperm development and showing altered or suppressed germination, was characterized with the aim to identify genes involved ...in embryogenesis and related to hormone action. The defects in seed germination and seeding establishment were explored using two different approaches: by analyzing enzymes that exhibit a well defined pattern of temporal expression in the scutellum during germination (catalase-2, malate synthetase and glutamine synthetase), and by examining the response of developing embryos to a specific class of growth regulators, the cytokinins. Mutants fall into two groups according to their ability to induce enzymes involved in the germination process during imbibition. The morphogenetic response to cytokinins of mutant embryos varied in the different mutants analyzed. The strongest response was observed with the mutant ed*41 which was defective in the differentation of shoot apex: in the presence of cytokinins, normal seedling growth was restored. The phenotype of ed*41 and its response to cytokinins suggest that this mutant is impaired in cytokinin mediated processes
Un gruppo di mutanti di mais con cariosside diffettosa (dek) nello sviluppo dell'embrione e dell'endosperma ed evidenzianti l'alterazione o la completa soppressione della germinazione e' stato caratterizzato allo scopo di identificare i geni interessati nell'embriogenesi e collegati all'azione degli ormoni. I difetti nella germinazione del seme e nello sviluppo della plantula sono stati studiati utilizzando due approcci differenti: analizzando enzimi che manifestano un modello ben definito di espressione temporale nello scutello durante la germinazione (catalasi-2, malato sintetasi e glutamina sintetasi) ed esaminando la risposta degli embrioni in corso di sviluppo a una specifica classe di regolatori della crescita, le citochinine. I mutanti ricadono in due gruppi secondo la loro capacita' o incapacita' di indurre la formazione dgli enzimi coinvolti nel processo di germinazione durante l'imbibizione. La risposta morfogenetica degli embrioni alle citochinine variava nei diversi mutanti analizzati. La risposta piu' forte e' stata osservata nel mutante ed*41 che presentava un difetto nella differenziazione dell'apice vegetativo: in presenza di citochinine veniva ripristinata la normale crescita delle piante. Il fenotipo di ed*41 e la sua risposta alle citochinine fa ritenere che questo mutante non sia sincronizzato per quanto riguarda i processi mediati dalle citochinine
The pathway of anthocyanin biosynthesis is well known while its regulation is less characterized. In this paper we focus our attention on the process of anthocyanin photoinduction. The results ...obtained following irradiation of seedling root tissues with lights of different quality disclose a significant response to blue light, apparently not attributable to phytochrome action. Even when anthocyanin accumulation is significantly increased because of the presence of Pl, a pigment intensifier, the total phytochrome content is not affected. The blue light effect is general in the sense that is observed in all genetic back-grounds tested. Photoinduction of anthocyanin accumulation in viviparous mutants blocked in carotenogenesis depends on blue light indicating that carotenoids are not involved in the blue response. Studies with calcium-channel blockers and calcium antagonists seem to exclude a requirement of Ca++ as an intermediary component of the light transduction pathway
La via della biosintesi dell'antiocianina e' nota mentre la sua regolazione e' meno caratterizzata. In questo articolo si pone attenzione al processo di fotoinduzione dell'antiocianina. I risultati ottenuti seguendo l'irradiazione dei tessuti radicali delle piantine con luci di diversa qualita' forniscono una risposta significativa alla luce blu, apparentemente non attribuibile all'azione del fitocromo. Anche quando l'accumulo di antiocianina e' maggiore a causa della presenza di Pl, un intensificatore del pigmento, il contenuto totale di fitocromo non viene influenzato. L'effetto luce blu e' generale nel senso che viene osservato in tutti gli ambienti genetici testati. La fotoinduzione dell'accumulo di antiocianina in mutanti vivipari bloccati nella carotenogenesi dipende dalla luce blu, il che indica che i carotenoidi non hanno a che fare con la risposta al blu. Gli studi con i bloccanti del canale del calcio e gli antagonisti del calcio sembrano escludere la richiesta di Ca++ come componente intermedia del percorso di trasferimento della luce
