Andrea Massironi

Inclusive Higgs boson production at large transverse momentum is induced by different production channels. We focus on the leading production mechanism through gluon fusion, and perform a consistent combination of the state of the art calculations obtained in the infinite-top-mass effective theory at next-to-next-to-leading order (NNLO) and in the full Standard Model (SM) at next-to-leading order (NLO). We thus present approximate QCD predictions for this process at NNLO, and a study of the corresponding perturbative uncertainties. This calculation is then compared with those obtained with commonly used event generators, and we observe that the description of the considered kinematic regime provided by these tools is in good agreement with state of the art calculations. Finally, we present accurate predictions for other production channels such as vector boson fusion, and associated production with a gauge boson, and with a t\bar{t} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>t</mml:mi><mml:mover><mml:mi>t</mml:mi><mml:mo accent="true">‾</mml:mo></mml:mover></mml:mrow></mml:math> pair. We find that, at large transverse momentum, the contribution of other production modes is substantial, and therefore must be included for a precise theory prediction of this observable.

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.

We present the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 3--21 June, 2013). Our report includes new computational tool developments, studies of the implications of the Higgs boson discovery on new physics, important signatures for searches for natural new physics at the LHC, new studies of flavour aspects of new physics, and assessments of the interplay between direct dark matter searches and the LHC.

Abstract The increasing LHC luminosity in Run III and, consequently, the increased number of simultaneous proton-proton collisions (pile-up) pose significant challenges for the CMS experiment. These challenges will affect not only the data taking conditions, but also the data processing environment of CMS, which requires an improvement in the online triggering system to match the required detector performance. In order to mitigate the increasing collision rates and complexity of a single event, various approaches are being investigated. Heterogenous computing resources, recently becoming prominent and abundant, may be significantly better performing for certain types of workflows. In this work, we investigate implementations of common algorithms targeting heterogenous platforms, such as GPUs and FPGAs. The local reconstruction algorithms of the CMS calorimeters, given their granularity and intrinsic parallelizability, are among the first candidates considered for implementation in such heterogenous platforms. We will present the current development status and preliminary performance results. Challenges and various obstacles related to each platform, together with the integration into CMS experiments framework, will be further discussed.

We present the first parton-level study of anomalous effects in triboson production in both fully and semi-leptonic channels in proton-proton collisions at 13 TeV at the Large Hadron Collider (LHC). The sensitivity to anomalies induced by a minimal set of bosonic dimension-6 operators from the Warsaw basis is evaluated with specific analyses for each final state. A likelihood-based strategy is employed to assess the most sensitive kinematic observables per channel, where the contribution of Effective Field Theory operators is parameterized at either the linear or quadratic level. The impact of the mutual interference terms of pairs of operators on the sensitivity is also examined. This benchmark study explores the complementarity and overlap in sensitivity between different triboson measurements and paves the way for future analyses at the LHC experiments. The statistical combination of the considered final states allows setting stringent bounds on five bosonic Wilson coefficients.

A bstract We present the first parton-level study of anomalous effects in triboson production in both fully and semi-leptonic channels in proton-proton collisions at 13 TeV at the Large Hadron Collider (LHC). The sensitivity to anomalies induced by a minimal set of bosonic dimension-6 operators from the Warsaw basis is evaluated with specific analyses for each final state. A likelihood-based strategy is employed to assess the most sensitive kinematic observables per channel, where the contribution of Effective Field Theory operators is parameterized at either the linear or quadratic level. The impact of the mutual interference terms of pairs of operators on the sensitivity is also examined. This benchmark study explores the complementarity and overlap in sensitivity between different triboson measurements and paves the way for future analyses at the LHC experiments. The statistical combination of the considered final states allows setting stringent bounds on five bosonic Wilson coefficients.

The father’s right to kill his adulterous daughter that had been introduced by Roman law aroused some interesting discussions among law scholars even in the Modern Age. They accepted the idea that the father could kill his daughter and her lover with impunity in the case of flagrant adultery. This right could be deemed as connected to paternal authority. It was a relic of the ancient ius vitae ac necis which, meanwhile, had developed into a milder right to chastise a disobedient child. Some law scholars dealing with father’s powers between the 16th and the 17th centuries dedicated entire chapters of their works to this considerably interesting topic. The father would be granted impunity only if he had killed his adulterous daughter on certain conditions required by Roman law. The legacy of Roman law on this matter was very clear indeed, but the law scholars of the late ius commune had to update those conditions and to clarify them. Furthermore, law scholars discussed some aspects of the father’s right to kill his adulterous daughter that were still disputed and had not received a definitive solution, such as the father’s possibility to ask someone for help or to kill his daughter despite the fact that she was pregnant. Other important subjects were also dealt with, e.g. presumptions and circumstantial evidences in adultery, which was a hard-to-prove crime. The father’s right to kill his adulterous daughter also caused moral problems because, although it was lawful, it did not prevent the father from committing a mortal sin: in this way, the relationship between internal forum and external forum was often dealt with as a pivotal topic.

High-Luminosity running at the LHC, which is planned for 2022 and beyond, will imply an order of magnitude increase in radiation levels and particle fluences with respect to the present LHC running conditions. The performance evolution of the CMS electromagnetic calorimeter (ECAL), comprising 75,848 scintillating lead tungstate crystals, indicates that an upgrade of its endcaps will be needed for HL-LHC running, to ensure an adequate performance. Results from LHC collision periods, beam tests and laboratory measurements of proton-irradiated crystals are combined to predict the performance of the current detector at the HL-LHC. In addition, an overview is given of various R and D studies towards a replacement of the ECAL endcaps for the HL-LHC running period.

The CMS electromagnetic calorimeter (ECAL) is a high-resolution, hermetic, and homogeneous calorimeter made of 75,848 scintillating lead tungstate crystals. Following the discovery of the Higgs boson, the CMS ECAL is at the forefront of precision measurements and the search for new physics in data from the LHC, which recently began producing collisions at the unprecedented energy of 13 TeV. The exceptional precision of the CMS ECAL, as well as its timing performance, are invaluable tools for the discovery of new physics at the LHC Run 2. The excellent performance of the ECAL relies on precise calibration maintained over time, despite severe irradiation conditions. A set of inter-calibration procedures using different physics channels is carried out at regular intervals to normalize the differences in crystal light transparency and photodetector response between channels, which can change due to accumulated radiation. In this talk we present new reconstruction algorithms and calibration strategies which aim to maintain, and even improve, the excellent performance of the CMS ECAL under the new challenging conditions of Run 2.

The electromagnetic calorimeter (ECAL) of the Compact Muon Solenoid Experiment (CMS) started operating at the Large Hadron Collider (LHC) in Spring 2015 with proton-proton collisions at 13 TeV center-of-mass energy and at a reduced bunch spacing of 25 ns. The instantaneous luminosity during LHC Run 2 is expected to exceed the levels achieved in LHC Run 1 significantly. In this talk we present new reconstruction algorithms and calibration strategies to maintain the superb performance of the CMS ECAL under these challenging conditions. We will show first performance results from the 2015 data taking period and give an outlook on the foreseen performance for Run 2. The current Run 2 of LHC is expected to accumulate a few hundred inverse femtobarn of proton-proton collisions before LHC will be upgraded to provide an even higher instantaneous luminosity, referred to as High-Luminosity LHC (HL-LHC). HL-LHC is expected to provide a few inverse attobarn of integrated luminosity. This will result in even higher rates of simultaneous proton-proton collisions, called pile-up (PU), up to and exceeding 140 PU collisions. Likewise the physics event rates will increase further which requires upgrades to the readout and trigger electronics of the existing ECAL. We will briefly discuss the upgrade plans and present in detail the plans to combat the PU under these conditions. One promising technique is based on the very good time resolution the CMS ECAL provides. We present the current status of timing performance of the CMS ECAL, plans to improve this for the future and examples of how this can be used for PU mitigation.

Fin dal XVI secolo la scienza criminalistica di area tedesca interpreta le disposizioni della Constitutio Criminalis Carolina relative all’intervento del difensore nel processo, meno severe rispetto a quelle delle coeve normative europee, da un lato delineando l’avvocato sempre piu come persona esperta di diritto, dall’altro limitandone l’azione, per non contrastare la speditezza e l’efficienza perseguite dal processo di stampo inquisitorio. Questa prospettiva influenza le scelte dei legislatori austriaci, che si radicalizzano dal Settecento in poi nell’opera di unificazione legislativa di Maria Teresa e nei successivi codici.

The measurement of Higgs pair production will be one of the cornerstones of the LHC physics program in the coming years, with the upcoming high-energy and high-luminosity phase. The Vector Boson Fusion (VBF) production channel probes directly the coupling of new physics and of Higgs to gauge bosons, in addition to reducing background contribution. The production via VBF of an heavy object on-shell, subsequently decaying to a Higgs boson pair, may occur: the case of a KK-graviton from warped extra dimension models will be taken as a benchmark. In addition, in the VBF channel, the production of Higgs pairs is sensitive to the strong interactions of a composite Higgs boson, and would allow a direct extraction of the hhVV quartic coupling. Other anomalous couplings of the Higgs to itself or to vector bosons would also lead to modified production rate and kinematics.

Vector Boson Scattering (VBS) and Vector Boson Fusion (VBF) studies in pp collisions at 7 and 8 TeV center of mass energy based on data recorded by the CMS detector at the LHC in 2011 and 2012 are reported.

Vector Boson Scattering (VBS) and Vector Boson Fusion (VBF) studies in pp collisions at 7 and 8 TeV center of mass energy based on data recorded by the CMS detector at the LHC in 2011 and 2012 are reported.

Recent results on Standard Model and Higgs boson measurements performed by ATLAS and CMS collaborations are reported. The presentation includes results based on LHC Run II data, with particular relevance on most recent ones. Precision measurements reachable with Run II data are discussed, such as the most up-to-date differential distributions.

The most recent results from 7 and 8 TeV data taking period at LHC with the CMS detector, looking at the Higgs boson decaying to a W-boson pair, are reported.The search at √ s = 13 TeV with an integrated luminosity of 2.3 ± 0.1 fb -1 , collected by the CMS detector in 2015, is described as well.The W + W -candidates are selected in events with an oppositely charged eµ pair in association with up to one jet.The observed (expected) significance with the 13 TeV analysis for the SM Higgs boson with a mass of 125 GeV is 0.7σ (2.0σ ), corresponding to an observed cross section times branching ratio of 0.3 ± 0.5 times the standard model prediction.

The electromagnetic calorimeter (ECAL) of the CMS experiment, that will take data at LHC, has been designed to get an excellent energy resolution, essential to search for diphotonic resonances. ECAL is made of lead tungstate crystals whose individual response, that depends on several contributions, affects the resolution of the Whole detector. Hence, a channel-to-channel intercalibration is required to get the goal performances. The calibration of the detector at the start-up and the in situ calibration strategies are reported.

Nel Decretum di Graziano trovarono accoglienza alcuni testi (per la maggior parte scritti di Agostino di Ippona e di Gregorio Magno e canoni conciliari del VI e del VII secolo) che trattavano il tema della correzione del clero regolare e secolare da parte del superiore gerarchico, in special modo del vescovo e dell’abate. All’interno di una diocesi, infatti, il vescovo era chiamato in prima persona a intervenire per controllare i chierici sottoposti alla sua autorità. Lo stesso valeva per l’abate nel monastero che reggeva.Quali erano gli strumenti a loro disposizione per condurre verso l’emenda chi avesse dato segni e compiuto gesti classificabili come indisciplina? Sicuramente ammonire, esortare o addirittura minacciare erano le prime strade da percorrere. Tuttavia, per quanto fossero autorevoli tali moniti, rischiavano di rimanere ignorati in mancanza di strumenti che li rendessero efficaci. La liceità e le modalità di esercizio dell’uso della violenza fisica quale strumento di correzione e punizione – comunemente accettato a tutti i livelli della società, dato che peraltro era raccomandato anche dalle Scritture –, non emergevano tuttavia in modo perspicuo dalla lettura dei capitoli grazianei. Infatti, a fronte del riconoscimento operato da alcuni di essi, altri sembravano guardarvi con titubanza e porvi limiti, se non addirittura divieti, poiché non era conveniente che uomini di Chiesa adoperassero tali mezzi o di tali mezzi fossero i destinatari. Un capitolo, in particolare, costituiva un serio ostacolo all’impiego della forza a fini disciplinari. Si trattava di un testo più tardo (almeno nella sua formulazione definitiva), cioè il celebre can. 15 (Si quis suadente) del II Concilio lateranense del 1139, che introducendo l’intangibilità fisica delle persone consacrate – pena la scomunica – ammantava la figura del chierico di un’aura di sacralità che pareva rendere assai difficile per il superiore avvalersi dei tradizionali strumenti 'educativi'. Tuttavia, numerose decretali successive (di Alessandro III, Celestino III, Innocenzo III e Gregorio IX) implementarono la materia, prevedendo una serie di eccezioni al cd. privilegium canonis. Si sollevavano così dal rischio di incorrere nella scomunica coloro che esercitavano verso i loro sottoposti una legittima potestà, che si poteva articolare pertanto anche nell’impiego della coercizione fisica. La scienza giuridica canonistica, da parte sua, svolgeva il fondamentale compito di coordinare tra loro le diverse fonti, soprattutto interpretando i testi del Decretum grazianeo alla luce dello ius novum di emanazione pontificia, cercando di definire con chiarezza i limiti, le modalità e la portata dei poteri di correzione dei soggetti che erano quindi pienamente legittimati a intervenire verso chierici e monaci per contenere la loro immoralità, distoglierli dalla propensione al peccato e contrastarne la disobbedienza e l’indisciplina.

In Roman law a gift mortis causa was a transfer of property carried out in contemplation or anticipation of the donor’s death. A dispute aroused among Roman lawyers about the status and the effects of this kind of transaction. Due to its anomalous character, some of them deemed that a gift in contemplation of death was comparable with a last will, while some others thought that it was assimilable to contracts. Emperor Justinian eventually decided that a donatio mortis causa had to be considered as a legacy. Nevertheless, law scholars in the Middle Ages and in the Modern Era who studied the Justinian body of civil law were not satisfied with such a classification. Thus, new disputes arose regarding this topic. Some highlighted the affinity of gift mortis causa with legacy, others with donatio inter vivos. The idea that a gift in contemplation of death was amphibious, i.e. it had a mixed nature, also started to be defended: it was a peculiar type of gift among the categories of gifts inter vivos and legacies, and it therefore belonged to a category which appeared, in some respects, to be sui generis. This was not only a theoretical question since different consequences derived from the qualification of the gift in contemplation of death. In this way, the jurists of the ius commune deepened the discipline of donatio mortis causa, particularly focusing on its essential requirements, so that they could distinguish it from other similar transactions (above all from donatio inter vivos). This helped lawyers to find a solution to problems arising in everyday life. For this purpose, the provision of the revocability of the gift played a key role (and the elements of testamentary dispositions were assumed to be predominant). Thus, donatio mortis causa is a clear example of medieval law scholars’ approach to the Justinian Corpus iuris civilis. Indeed, it was their unavoidable starting point, from which they then moved on in order to build up new theories to face the changes of the society they lived in.