Consumer engagement with football brands on Facebook

The growth of social media has forced brands to adapt the scope of their activities in terms of brand management, consumer engagement and customer communications. Football brands have recently started to understand the relevance of social media as a tool for exploiting the enormous potential they possess, much due to their well-established brand awareness, brand identity and, most of all, the passion they more easily trigger in fans. The goal of this research is to determine the most influential motivations that trigger consumers to engage with a football brand on Facebook. Furthermore, we want to understand if between brand love, brand image and consumer engagement influence brand loyalty towards football brands. To do so, we have collected data from 214 respondents that were questioned about this subject, after which we performed correlation analysis in order to test these relations. Our findings point out that entertainment, personal identity and social influence are the most influential types of motivations to engage with a football brand on Facebook. Trust in the brand, despite not showing the same relevance, also came out as a significant variable. Other results indicate that there is a positive relation between brand love, brand image, consumer engagement and, lastly, brand loyalty. Our findings and the respective managerial implications they might present are discussed, also providing indications and suggestions regarding future researches concerning this subject

Search for flavour changing neutral currents in top quark decays in ATLAS

[Excerpt] Within the Standard Model flavour changing neutral currents (FCNC) are forbidden at tree level and much smaller than the dominant decay mode (t → bW) at one loop level. Nonetheless, several Standard Model extensions predict higher branching fractions (BR) for the top quark FCNC decays [1], making the search for FCNC processes an important probe for new physics in the top quark sector. In the present analysis [2], the t → qZ decay channel is searched for by looking for top quark pair production with one top quark decaying through FCNC (t → qZ) and the other through the Standard Model dominant mode (t → bW). Only the leptonic decays of the Z and W bosons were considered (Z → e+e−,µ+µ− and W → eν,µν) as signal. ATLAS data collected at a centre-of-mass energy of √s = 7 TeV during 2010 and corresponding to an integrated luminosity of 35 pb−1 are used. Presently, the most stringent experimental limits on BR(t → qZ) were obtained by the DO Collaboration: BR(t → qZ) < 3.2% at 95% confidence level (CL) [3]. [...](undefined)info:eu-repo/semantics/publishedVersio

Flavour-changing neutral scalar interactions of the Top Quark

A study of the top-quark interactions via flavour-changing neutral current (FCNC) processes provides an intriguing connection between the heaviest elementary particle of the standard model (SM) of particle physics and the new scalar bosons that are predicted in several notable SM extensions. The production cross sections of the processes with top-scalar FCNC interactions can be significantly enhanced to the observable level at the CERN Large Hadron Collider. The present review summarises the latest experimental results on the study of the top-quark interactions with the Higgs boson via an FCNC and describes several promising directions to look for new scalar particles.NC is supported by the FCT—Fundação para a Ciências e a Tecnologia, Portugal, under project CERN/FIS-PAR/0032/2021

W-polarisation and constraints on Wtb-vertex

The structure of the Wtb-vertex can be tested using single top and tt̄ events collected at the LHC. The measurement of the t-channel single top quark production cross section by the CMS Collaboration was used to constrain the V tb CKM matrix element, while the measurements of the helicity fractions of W bosons and angular asymmetries in top quark decays by the ATLAS Collaboration were used to constrain possible new physics contributions to the W tb -vertex.Nuno Castro is supported by Fundação para a Ciˆencia e a Tecnologia, Portugal (project CERN/FP/116346/2010 and grant SFRH/BPD/63495/2009).info:eu-repo/semantics/publishedVersio

Omeletes e ovos na ciência em Portugal

Artigo de opinião publicado no jornal "Publico" na edição de 31 de janeiro de 2024.[Excerto] Estamos a entrar em período eleitoral e é desejável que se apresentem aos cidadãos propostas e visões sobre os diversos temas que afetam a nossa vida em sociedade. Uma democracia saudável depende deste debate, que se espera contínuo, mas que, compreensivelmente, se torna mais intenso e visível nos tempos que antecedem eleições. Sendo o sistema nacional de ciência e tecnologia (SNCT) um dos pilares fundamentais para o desenvolvimento do país, seria de esperar que tivesse também algum destaque no debate político. Creio, no entanto, que não tem sido esse o caso. É verdade que se fala com frequência de temas relacionados, tais como o impacto de tecnologias emergentes e até, por vezes, sobre o financiamento, ou da falta dele, das instituições de ensino superior e da investigação científica em geral. [...]info:eu-repo/semantics/publishedVersio

Hubert Reeves (1932-2023)

[Excerto] A notícia da morte de Hubert Reeves (1932-2023) transportou-me para a minha adolescência. De facto, o seu livro "Um pouco mais de azul", editado pela Gradiva em 1983, marcou-me ao ponto de ser uma das sementes que me levou a querer ser físico e participar na maravilhosa aventura que é a descoberta do nosso universo. [...

Measurements of top-quark pair differential and double-differential cross-sections in the ℓ +jets channel with pp collisions at s√=13 TeV using the ATLAS detector

Single- and double-differential cross-section measurements are presented for the production of top-quark pairs, in the lepton + jets channel at particle and parton level. Two topologies, resolved and boosted, are considered and the results are presented as a function of several kinematic variables characterising the top and tt¯ system and jet multiplicities. The study was performed using data from pp collisions at centre-of-mass energy of 13 TeV collected in 2015 and 2016 by the ATLAS detector at the CERN Large Hadron Collider (LHC), corresponding to an integrated luminosity of 36 fb−1. Due to the large tt¯ cross-section at the LHC, such measurements allow a detailed study of the properties of top-quark production and decay, enabling precision tests of several Monte Carlo generators and fixed-order Standard Model predictions. Overall, there is good agreement between the theoretical predictions and the data.We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, The Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, UK; DOE and NSF, USA. In addition, individual groups and members have received support from BCKDF, CANARIE, CRCandComputeCanada, Canada; COST, ERC, ERDF, Horizon 2020, and Marie SklodowskaCurie Actions, European Union; Investissements d' Avenir Labex and Idex, ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; CERCA Programme Generalitat de Catalunya, Spain; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (The Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large nonWLCG resource providers. Major contributors of computing resources are listed ininfo:eu-repo/semantics/publishedVersio

Erratum to: Measurement of differential cross sections and W+/W− cross-section ratios for W boson production in association with jets at s√ = 8 TeV with the ATLAS detector

© 2020, The Author(s). Two additions impacting tables 3 and 4 in ref. [1] are presented in the following. No significant impact is found for other results or figures in ref. [1].info:eu-repo/semantics/publishedVersio

Search for invisible decays of the Higgs boson produced in association with a hadronically decaying vector boson in pp collisions at, root s=8 TeV with the ATLAS detector

A search for Higgs boson decays to invisible particles is performed using 20,3 of fb(-1) collision data at a centre-of-mass energy of 8 TeV recorded by the ArL As detector at the Large IHIadron Collider. The process considered is Higgs boson production in association with a vector boson (V = W or Z) that decays hadronically, resulting in events with two or more jets and large missing transverse momentum. No excess of candidates is observed in the data over the background expectation. The results are used to constrain V H production followed by H decaying to invisible particles for the Higgs boson mass range 115 inv.) varies from 1.6 pb at 115 GeV to 0.13 ph at 300 GeV. Assuming Standard Model production and including the gg -> H contribution as signal, the results also lead to an observed upper limit of 78 c/c at 95 % confidence level on the branching ratio of Higgs bosons decays to invisible particles at a mass of 125 GeV.We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWTW and EWE, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNN and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET, ERC and NSRF, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, DFG, IIGT, MPG and AvH Foundation, Germany; GSRT and NSRF, Greece; RGC, Hong Kong SAR, China; ISF, MINERVA, GIF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; BRF and RCN, Norway; MNiSW and NCN, Poland; GRICES and FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGE (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide.info:eu-repo/semantics/publishedVersio