Pub Date : 2018-09-01DOI: 10.1393/NCC/I2017-17174-6
A. Mathad
— We present here the search for Ξb and Ω − b baryon decays to the charmless hadronic final states ph−h′− at the LHCb detector, where h(′) denotes a kaon or pion. The analysis is based on a sample of proton-proton collision data collected at centre-of-mass energies √ s = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. We observe the decay of Ξb → pK−K− with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξb → pK−π− decay. This result is the first ever observation of a Ξb baryon decaying into charmless final state.
{"title":"First observation of the charmless decay of $Xi_b^- to pK^-K^-$ at LHCb","authors":"A. Mathad","doi":"10.1393/NCC/I2017-17174-6","DOIUrl":"https://doi.org/10.1393/NCC/I2017-17174-6","url":null,"abstract":"— We present here the search for Ξb and Ω − b baryon decays to the charmless hadronic final states ph−h′− at the LHCb detector, where h(′) denotes a kaon or pion. The analysis is based on a sample of proton-proton collision data collected at centre-of-mass energies √ s = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. We observe the decay of Ξb → pK−K− with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξb → pK−π− decay. This result is the first ever observation of a Ξb baryon decaying into charmless final state.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"1 1","pages":"174"},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88680844","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 : 2018-09-01DOI: 10.1393/NCC/I2017-17000-3
F. Bedeschi
— The Higgs boson discovery has been a major success of high energy physics, yet it gives us little guidance on how to best invest for future research facilities. It is however urgent to make important decisions soon to secure the continuation of this line of research after the HL-LHC program has been completed. We review physics and technology drivers that could suggest how to proceed in the choice of the next big accelerator.
{"title":"The day after LHC: Plans and prospects for future accelerators","authors":"F. Bedeschi","doi":"10.1393/NCC/I2017-17000-3","DOIUrl":"https://doi.org/10.1393/NCC/I2017-17000-3","url":null,"abstract":"— The Higgs boson discovery has been a major success of high energy physics, yet it gives us little guidance on how to best invest for future research facilities. It is however urgent to make important decisions soon to secure the continuation of this line of research after the HL-LHC program has been completed. We review physics and technology drivers that could suggest how to proceed in the choice of the next big accelerator.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"20 1","pages":"193"},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81007899","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 : 2018-09-01DOI: 10.1393/ncc/i2017-17191-5
C. Beskidt, W. Boer, D. Kazakov, S. Wayand
{"title":"Perspectives of direct detection of supersymmetric dark matter in the MSSM and NMSSM","authors":"C. Beskidt, W. Boer, D. Kazakov, S. Wayand","doi":"10.1393/ncc/i2017-17191-5","DOIUrl":"https://doi.org/10.1393/ncc/i2017-17191-5","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"6 1","pages":"191"},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78965914","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 : 2018-09-01DOI: 10.1393/NCC/I2017-17185-3
A. Cueto
{"title":"Inclusive isolated-photon production in $pp$ collisions at $sqrt s =$ 13 TeV","authors":"A. Cueto","doi":"10.1393/NCC/I2017-17185-3","DOIUrl":"https://doi.org/10.1393/NCC/I2017-17185-3","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"96 1","pages":"185"},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80564499","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 : 2018-09-01DOI: 10.1393/NCC/I2017-17163-9
M. Baker
— Thermal freeze-out of a weakly interacting massive particle is the dominant paradigm for dark matter production. This scenario is now being probed by direct and indirect detection experiments, as well as at colliders. The lack of convincing signals motivates us to consider alternative scenarios. In this contribution we discuss a scenario where the dark matter abundance is controlled by a “vev flipflop”, which sets the relic abundance via a period of dark matter decay just before electroweak symmetry breaking. We describe the mechanism and show that it is successful in a wide range of parameter space before discussing detection possibilities.
{"title":"Dark matter models beyond the WIMP paradigm","authors":"M. Baker","doi":"10.1393/NCC/I2017-17163-9","DOIUrl":"https://doi.org/10.1393/NCC/I2017-17163-9","url":null,"abstract":"— Thermal freeze-out of a weakly interacting massive particle is the dominant paradigm for dark matter production. This scenario is now being probed by direct and indirect detection experiments, as well as at colliders. The lack of convincing signals motivates us to consider alternative scenarios. In this contribution we discuss a scenario where the dark matter abundance is controlled by a “vev flipflop”, which sets the relic abundance via a period of dark matter decay just before electroweak symmetry breaking. We describe the mechanism and show that it is successful in a wide range of parameter space before discussing detection possibilities.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"35 1","pages":"163"},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87642190","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 : 2018-08-01DOI: 10.1393/NCR/I2018-10150-2
F. Calegari, A. Trabattoni, E. Månsson, J. Greenwood, P. Decleva, F. Martín, M. Nisoli
Summary. — Understanding the role of the electron dynamics in the photochemistry of bio-chemically relevant molecules is key to getting access to the fundamental physical processes leading to damage, mutation and, more generally, to the alteration of the fi nal biological functions. Sudden ionization of a large molecule has been proven to activate a sub-femtosecond charge fl ow throughout the molecular backbone, purely guided by electronic coherences, which could ultimately a ff ect the photochemical response of the molecule at later times. We can follow this ultrafast charge fl ow in realtime by exploiting the extreme time resolution provided by attosecond light sources. In this work recent advances in attosecond molecular physics are presented with particular focus on the investigation of bio-relevant
{"title":"Attosecond spectroscopy of bio-chemically relevant molecules","authors":"F. Calegari, A. Trabattoni, E. Månsson, J. Greenwood, P. Decleva, F. Martín, M. Nisoli","doi":"10.1393/NCR/I2018-10150-2","DOIUrl":"https://doi.org/10.1393/NCR/I2018-10150-2","url":null,"abstract":"Summary. — Understanding the role of the electron dynamics in the photochemistry of bio-chemically relevant molecules is key to getting access to the fundamental physical processes leading to damage, mutation and, more generally, to the alteration of the fi nal biological functions. Sudden ionization of a large molecule has been proven to activate a sub-femtosecond charge fl ow throughout the molecular backbone, purely guided by electronic coherences, which could ultimately a ff ect the photochemical response of the molecule at later times. We can follow this ultrafast charge fl ow in realtime by exploiting the extreme time resolution provided by attosecond light sources. In this work recent advances in attosecond molecular physics are presented with particular focus on the investigation of bio-relevant","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"36 1","pages":"415-461"},"PeriodicalIF":4.5,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73147991","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 : 2018-06-06DOI: 10.1393/ncr/i2018-10148-8
S. Olivares
When applied to practical problems, the very laws of quantum mechanics can provide a unique resource to beat the limits imposed by classical physics: this is the case of quantum metrology and high-precision sensing. Here we review the main results obtained in the recent years at the Quantum Technology Lab of the Department of Physics “Aldo Pontremoli” of the University of Milan, also in collaboration with national and international institutions. In particular we focus on the application of continuous-variable optical quantum states and operations to improve different fields of research, ranging from interferometry to more fundamental problems, such as the testing of quantum gravity.
{"title":"High-precision innovative sensing with continuous-variable optical states","authors":"S. Olivares","doi":"10.1393/ncr/i2018-10148-8","DOIUrl":"https://doi.org/10.1393/ncr/i2018-10148-8","url":null,"abstract":"When applied to practical problems, the very laws of quantum mechanics can provide a unique resource to beat the limits imposed by classical physics: this is the case of quantum metrology and high-precision sensing. Here we review the main results obtained in the recent years at the Quantum Technology Lab of the Department of Physics “Aldo Pontremoli” of the University of Milan, also in collaboration with national and international institutions. In particular we focus on the application of continuous-variable optical quantum states and operations to improve different fields of research, ranging from interferometry to more fundamental problems, such as the testing of quantum gravity.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"55 1","pages":"341-382"},"PeriodicalIF":4.5,"publicationDate":"2018-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82368026","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 : 2018-05-15DOI: 10.1393/ncc/i2018-18131-7
S. Dado, A. Dar
The short hard gamma ray burst (SHB) 170817A that followed the first neutron stars merger (NSM) detected in gravitational waves (GWs) has shown beyond doubt that NSMs produce SHBs. Its low luminosity and other properties that differ from those of ordinary SHBs, were predicted by the cannonball model of GRBs for relatively nearby SHBs, which almost entirely are low luminosity SHBs viewed from far off-axis. Such far off-axis low luminosity SHBs are mostly the smoking guns of only nearby NSMs, like those detectable by Ligo-Virgo. The smoking guns of much more distant NSMs are PWN afterglows powered by the spin-down of the nascent n*s, preceded by a visible SHB, or by an invisible SHB, which is beamed away from Earth.
{"title":"The Smoking Guns Of Neutron Stars Mergers","authors":"S. Dado, A. Dar","doi":"10.1393/ncc/i2018-18131-7","DOIUrl":"https://doi.org/10.1393/ncc/i2018-18131-7","url":null,"abstract":"The short hard gamma ray burst (SHB) 170817A that followed the first neutron stars merger (NSM) detected in gravitational waves (GWs) has shown beyond doubt that NSMs produce SHBs. Its low luminosity and other properties that differ from those of ordinary SHBs, were predicted by the cannonball model of GRBs for relatively nearby SHBs, which almost entirely are low luminosity SHBs viewed from far off-axis. Such far off-axis low luminosity SHBs are mostly the smoking guns of only nearby NSMs, like those detectable by Ligo-Virgo. The smoking guns of much more distant NSMs are PWN afterglows powered by the spin-down of the nascent n*s, preceded by a visible SHB, or by an invisible SHB, which is beamed away from Earth.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"48 1","pages":"131"},"PeriodicalIF":4.5,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82527763","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 : 2018-04-01DOI: 10.1393/NCC/I2018-18044-5
D. Marangotto
{"title":"Searches for CP violation in beauty baryons at LHCb","authors":"D. Marangotto","doi":"10.1393/NCC/I2018-18044-5","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18044-5","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"27 1","pages":"44"},"PeriodicalIF":4.5,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73549026","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 : 2018-03-28DOI: 10.1393/ncc/i2017-17053-2
A. Palazzo
Several anomalies observed in short-baseline neutrino experiments suggest that the standard 3-flavor framework may be incomplete and indicate the existence of light sterile neutrinos. Here, we present a brief review of the status of the neutrino oscillations within the 3+1 scheme, the minimal extension of the standard 3-flavor framework with one sterile neutrino. We stress the potential role of LBL experiments in the searches of CP violation related to sterile neutrinos and their synergy with the SBL experiments.
{"title":"Phenomenology of light sterile neutrinos","authors":"A. Palazzo","doi":"10.1393/ncc/i2017-17053-2","DOIUrl":"https://doi.org/10.1393/ncc/i2017-17053-2","url":null,"abstract":"Several anomalies observed in short-baseline neutrino experiments suggest that \u0000the standard 3-flavor framework may be incomplete and indicate the existence \u0000of light sterile neutrinos. Here, we present a brief review of the status of the neutrino \u0000oscillations within the 3+1 scheme, the minimal extension of the standard 3-flavor framework with one sterile neutrino. We stress the potential role of LBL experiments in the searches of CP violation related to sterile neutrinos and their synergy with the SBL experiments.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"55 1","pages":"53"},"PeriodicalIF":4.5,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90684241","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：