1,720,964 research outputs found
Analysis of the q\bar q\to Z^* \to hA \to4τ process within the lepton-specific 2HDM at the LHC
No full textWe analyse light Higgs scalar and pseudoscalar associated hadro-production in the 2-Higgs Doublet Model (2HDM) Type-X (or lepton-specific) within the parameter space allowed by theoretical self-consistency requirements as well as the latest experimental constraints from the Large Hadron Collider (LHC), precision data and B physics. Over the viable regions of such a scenario, the Standard Model-like Higgs boson discovered at the LHC in 2012 is the heavier CP-even state H. Furthermore, in the Type-X scenario, due to large \tan\beta, the lighter Higgs scalar h and the pseudoscalar A mainly decay into two \tau leptons. Therefore, we concentrate on analysing the signal process pp\to Z^{*} \to hA\to \tau^{+}\tau^{-}\tau^{+}\tau^{-}\to \ell \nu_\ell \ell \nu_\ell \tau_h \tau_h (where \ell= e, \mu whereas \tau_h represents the hadronic decay of the \tau) and explore the feasibility of conducting such a search at the LHC with a centre-of-mass energy of \sqrt{s}~= 14 TeV and a luminosity of L~=~300~fb^{-1}. To suppress the huge SM background, we confine ourselves to consider the fraction of signal events with two same-sign \tau leptons further decaying into same-sign leptons while the other two \tau leptons decay hadronically. We find that a combination of kinematical selection and machine learning (ML) analysis will yields significant sensitivity to this process at the end of the LHC Run 3
Discovering a light charged Higgs boson via W<sup>±∗</sup> + 4b final states at the LHC
No full textMost of the current experimental searches for charged Higgs bosons at the Large Hadron Collider (LHC) concentrate upon the tb and τν decay channels. In the present study, we analyze instead the feasibility of the bosonic decay channel W±∗h, with the charged gauge boson being off-shell and h being a neutral light Higgs boson, which decays predominantly into bb¯. We perform a Monte Carlo (MC) analysis for the associate production of a charged Higgs with such a light neutral one, pp→H±h, at the LHC followed by the aforementioned charged Higgs boson decay, which leads to a W±∗+4b final state. The analysis is performed within the 2-Higgs Doublet Model (2HDM) with Yukawa texture of Type-I. We take into account all available experimental constraints from LEP, Tevatron and the LHC as well as the theoretical requirements of self-consistency of this scenario. In order to study the full process pp→H±h→W±∗hh→ℓ±ν+4b (ℓ=e,μ), we provide several Benchmark Points (BPs) amenable to further analysis, with MH±+Mb<Mt, for which we prove that there is a strong possibility that this spectacular signal could be found at the LHC with center of mass energy 14 TeV and luminosity 300 fb−1
Probing a light charged Higgs boson at the LHC Run 3
No full textWe study the Large Hadron Collider (LHC) discovery prospects
of a light charged Higgs boson decaying into a W boson and a non-Standard Model (SM)-like Higgs
within the 2-Higgs Doublet Model type-I. In the analysis, we consider the
associated production of a charged Higgs boson with a light neutral one, pp
→ H± ℎ with the subsequent H± → W±*h.
We then investigated the emerging W±* + 4b final state
and provide several benchmark points for signal-to-background analysis. We
therefore show that this signal could be an excellent avenue for identifying H±
at the LHC.</p
Probing a light Higgs in in Type-I 2HDM at the LHC
No full textIn this study, we explore the potential to probe the process at the Large Hadron Collider (LHC), within the framework of the Two Higgs Doublet Model (2HDM) Type-I. After performing a detailed Monte Carlo (MC) simulation, we focus on isolating the signal from the Standard Model (SM) backgrounds. Our analysis employs a dedicated trigger choice and optimised kinematic selection to improve the signal sensitivity. We demonstrate some sensitivity to this decay channel at Run 3, while the High-Luminosity LHC (HL-LHC) can provide discovery evidence
Probing a 2HDM Type-I light Higgs state via HSM→hh→bb¯γγ at the LHC
No full textWe study the discovery potential for a light Higgs boson via gg→HSM-like→hh→bb¯γγ process at the Large Hadron Collider (LHC). Focusing on the 2-Higgs Doublet Model (2HDM) Type-I, which can accommodate light neutral Higgs states, of O(100) GeV or less in mass, while agreeing with theoretical and up-to-date experimental constraints, we explore the feasibility of a light CP-even Higgs state h via the largely unexplored final state bb¯γγ at Run-3 of the LHC. We further propose a few Benchmark Points (BPs) for future searches
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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