Pub Date : 2018-01-01DOI: 10.1393/ncc/i2018-18024-9
M. Sessa
— The Higgs boson plays an important role in the Standard Model: it provides mass to the elementary particles through the electroweak spontaneous symmetry breaking (EWSB). Discovered in 2012 by the ATLAS and CMS Collaborations, today the Higgs boson is a very powerful tool to test the validity of SM theory at the TeV scale. The Higgs boson can be produced at proton-proton colliders, such as LHC, in different ways and many decay channels are predicted by the Standard Model. At ATLAS Run-2, this particle is widely studied mainly through its decays in vectors boson pairs (H → ZZ∗, H → WW ∗ and H → γγ). In this context, the latest results, obtained using the dataset collected by the ATLAS experiment during 2015 and 2016 at a center-of-mass energy of 13 TeV, are presented. Experimental techniques and estimates of the main backgrounds will be discussed in detail.
{"title":"Italian Physical Society : Study of the decays of the Higgs boson to boson pairs at Run-II with the ATLAS experiment","authors":"M. Sessa","doi":"10.1393/ncc/i2018-18024-9","DOIUrl":"https://doi.org/10.1393/ncc/i2018-18024-9","url":null,"abstract":"— The Higgs boson plays an important role in the Standard Model: it provides mass to the elementary particles through the electroweak spontaneous symmetry breaking (EWSB). Discovered in 2012 by the ATLAS and CMS Collaborations, today the Higgs boson is a very powerful tool to test the validity of SM theory at the TeV scale. The Higgs boson can be produced at proton-proton colliders, such as LHC, in different ways and many decay channels are predicted by the Standard Model. At ATLAS Run-2, this particle is widely studied mainly through its decays in vectors boson pairs (H → ZZ∗, H → WW ∗ and H → γγ). In this context, the latest results, obtained using the dataset collected by the ATLAS experiment during 2015 and 2016 at a center-of-mass energy of 13 TeV, are presented. Experimental techniques and estimates of the main backgrounds will be discussed in detail.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84024455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/ncc/i2018-18006-y
G. Callea
{"title":"Italian Physical Society : Measurement of isolated-photons plus jet production in $pp$ collisions with the ATLAS detector","authors":"G. Callea","doi":"10.1393/ncc/i2018-18006-y","DOIUrl":"https://doi.org/10.1393/ncc/i2018-18006-y","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75198879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/ncc/i2018-18005-0
S. Biondi
{"title":"Italian Physical Society : Search for the associated production of the Higgs boson with a top quark pair at the ATLAS experiment","authors":"S. Biondi","doi":"10.1393/ncc/i2018-18005-0","DOIUrl":"https://doi.org/10.1393/ncc/i2018-18005-0","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73946102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18047-2
G. Mezzadri
— The Beijing Spectrometer III (BESIII) operates with the collisions provided by the Beijing Electron Positron Collider II (BEPCII), which is hosted at the Institute of High Energy Physics (IHEP) of Beijing, China. Since 2009, BESIII has collected the world’s largest sample of J/ψ, ψ(2S), and ψ(3770). In 2016 BEPCII has reached the design luminosity of 10 cm−2s−1, setting a world record for e+e− accelerators in this energy regime. Moreover, since BEPCII can provide collisions with center-of-mass energies between 2 and 4.6 GeV, BESIII has unique datasets to investigate the properties of the new exotic XY Z states, open charm decays, hadron spectroscopy and new physics searches, with no direct competitor in the τ -charm energy region. In this paper, an overview on the status of the BESIII experiment and of its more recent results is presented.
{"title":"A photo of the status of the BESIII experiment","authors":"G. Mezzadri","doi":"10.1393/NCC/I2018-18047-2","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18047-2","url":null,"abstract":"— The Beijing Spectrometer III (BESIII) operates with the collisions provided by the Beijing Electron Positron Collider II (BEPCII), which is hosted at the Institute of High Energy Physics (IHEP) of Beijing, China. Since 2009, BESIII has collected the world’s largest sample of J/ψ, ψ(2S), and ψ(3770). In 2016 BEPCII has reached the design luminosity of 10 cm−2s−1, setting a world record for e+e− accelerators in this energy regime. Moreover, since BEPCII can provide collisions with center-of-mass energies between 2 and 4.6 GeV, BESIII has unique datasets to investigate the properties of the new exotic XY Z states, open charm decays, hadron spectroscopy and new physics searches, with no direct competitor in the τ -charm energy region. In this paper, an overview on the status of the BESIII experiment and of its more recent results is presented.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79874087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18060-5
G. Greco, T. Virgo
— The search for electromagnetic counterparts or neutrino emissions from gravitational-wave sources engages a wide scientific community with a growing trend of collaborations. Here, we outline the pathway that led to the birth of multimessenger astronomy with the first direct observations of the three gravitationalwave signals measured to date, focusing on the new challenges to face in the near future.
{"title":"Multi-messenger astronomy of gravitational-wave transients: Current status and future prospects","authors":"G. Greco, T. Virgo","doi":"10.1393/NCC/I2018-18060-5","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18060-5","url":null,"abstract":"— The search for electromagnetic counterparts or neutrino emissions from gravitational-wave sources engages a wide scientific community with a growing trend of collaborations. Here, we outline the pathway that led to the birth of multimessenger astronomy with the first direct observations of the three gravitationalwave signals measured to date, focusing on the new challenges to face in the near future.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76399449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18003-2
L. Barioglio
{"title":"Italian Physical Society : Study of the production of light (anti-)nuclei with the ALICE experiment at the LHC","authors":"L. Barioglio","doi":"10.1393/NCC/I2018-18003-2","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18003-2","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90627893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/ncc/i2018-18102-0
I. Garzia
Summary. — Since 2009, the BESIII experiment collected data in the center-of-energy range from 2 to 4.6 GeV, thus making it a unique environment to cover a broad range of physics topics. In this paper a selection of the recent BESIII results on the still mysterious XY Z states, hadron spectroscopy, as well as a very brief review on the charm and Λ c physics are reported.
{"title":"Recent results for the BESIII experiment","authors":"I. Garzia","doi":"10.1393/ncc/i2018-18102-0","DOIUrl":"https://doi.org/10.1393/ncc/i2018-18102-0","url":null,"abstract":"Summary. — Since 2009, the BESIII experiment collected data in the center-of-energy range from 2 to 4.6 GeV, thus making it a unique environment to cover a broad range of physics topics. In this paper a selection of the recent BESIII results on the still mysterious XY Z states, hadron spectroscopy, as well as a very brief review on the charm and Λ c physics are reported.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77356685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18101-1
F. Carnesecchi
{"title":"Recent RD to improve the time resolution and rate capability of the Multigap Resistive Plate Chamber","authors":"F. Carnesecchi","doi":"10.1393/NCC/I2018-18101-1","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18101-1","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74672276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18093-8
F. Tessarotto
— Thick-GEMs (THGEMs) are simple and robust gaseous multipliers, derived from the GEM design and proposed for large-scale applications. Classical THGEMs consist of Printed Circuit Boards (PCBs) with a regular pattern of holes obtained by drilling; they are manufactured by industry in large series and large size; their response for different geometrical parameters and operational conditions has been extensively studied. Different substrates (ceramic, glass, PTFE, etc.) and various production procedures have also been investigated with promising results. Different design options, like highly segmented electrodes, and different architectures, in particular those based on the Thick-WELL design are being actively studied. THGEMs are used as gaseous multipliers and as reflective photocathodes for VUV photons when coated with a CsI layer. THGEM-based Photon Detectors have been successfully implemented in 2016 on COMPASS RICH-1 for a total active area of 1.4 m. Applications of THGEM (also called LEM) technology in the field of cryogenic detectors, in particular for double-phase large volume Ar ones are proposed. The recently discovered phenomenon of bubble assisted electro-luminescence in liquid Xe opens the way to local dual phase cryogenic detector configurations when using THGEMs. The detection of X-rays and neutrons using THGEM-based devices is a very active field. Promising results have been obtained using THGEMs for imaging applications.
{"title":"THGEM: A fast growing MPGD technology","authors":"F. Tessarotto","doi":"10.1393/NCC/I2018-18093-8","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18093-8","url":null,"abstract":"— Thick-GEMs (THGEMs) are simple and robust gaseous multipliers, derived from the GEM design and proposed for large-scale applications. Classical THGEMs consist of Printed Circuit Boards (PCBs) with a regular pattern of holes obtained by drilling; they are manufactured by industry in large series and large size; their response for different geometrical parameters and operational conditions has been extensively studied. Different substrates (ceramic, glass, PTFE, etc.) and various production procedures have also been investigated with promising results. Different design options, like highly segmented electrodes, and different architectures, in particular those based on the Thick-WELL design are being actively studied. THGEMs are used as gaseous multipliers and as reflective photocathodes for VUV photons when coated with a CsI layer. THGEM-based Photon Detectors have been successfully implemented in 2016 on COMPASS RICH-1 for a total active area of 1.4 m. Applications of THGEM (also called LEM) technology in the field of cryogenic detectors, in particular for double-phase large volume Ar ones are proposed. The recently discovered phenomenon of bubble assisted electro-luminescence in liquid Xe opens the way to local dual phase cryogenic detector configurations when using THGEMs. The detection of X-rays and neutrons using THGEM-based devices is a very active field. Promising results have been obtained using THGEMs for imaging applications.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91060011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1393/NCC/I2018-18066-Y
M. Panetta
— The Extreme Energy Events Project is an experiment for the detection of Extensive Air Showers (EAS). It consists of a sparse array of about 50 muon telescopes distributed throughout the Italian territory plus CERN, covering an area of 3 × 10 km. Its distinctive feature is that the telescopes, based on Multigap Resistive Plate Chambers (MRPC), are housed in High Schools and managed by groups of students and teachers. About ∼ 40 × 10 muon tracks have been stored and analyzed since the first coordinated data taking in 2014. The analysis activity is currently in progress and focused on several items: coincidence searches of muons from the same EAS and long distance correlations between different EAS, study of time variations of the muon flux on ground level, searches for large scale cosmic ray anisotropy and for upward-going particles.
{"title":"Italian Physical Society : The Extreme Energy Events Project and its most recent results","authors":"M. Panetta","doi":"10.1393/NCC/I2018-18066-Y","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18066-Y","url":null,"abstract":"— The Extreme Energy Events Project is an experiment for the detection of Extensive Air Showers (EAS). It consists of a sparse array of about 50 muon telescopes distributed throughout the Italian territory plus CERN, covering an area of 3 × 10 km. Its distinctive feature is that the telescopes, based on Multigap Resistive Plate Chambers (MRPC), are housed in High Schools and managed by groups of students and teachers. About ∼ 40 × 10 muon tracks have been stored and analyzed since the first coordinated data taking in 2014. The analysis activity is currently in progress and focused on several items: coincidence searches of muons from the same EAS and long distance correlations between different EAS, study of time variations of the muon flux on ground level, searches for large scale cosmic ray anisotropy and for upward-going particles.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83956720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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