Pub Date : 2019-12-05DOI: 10.1007/s40766-019-0001-1
P. Carretta, G. Prando
{"title":"Iron-based superconductors: tales from the nuclei","authors":"P. Carretta, G. Prando","doi":"10.1007/s40766-019-0001-1","DOIUrl":"https://doi.org/10.1007/s40766-019-0001-1","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78290144","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 : 2019-09-20DOI: 10.1393/NCC/I2019-19125-7
A. Skawran, A. Adamczak, A. Antognini, N. Berger, T. Cocolios, R. Dressler, C. Düllmann, R. Eichler, P. Indelicato, K. Jungmann, K. Kirch, A. Knecht, J. Krauth, J. Nuber, A. Papa, R. Pohl, M. Pospelov, E. Rapisarda, D. Renisch, P. Reiter, N. Ritjoho, S. Roccia, N. Severijns, S. Vogiatzi, F. Wauters, L. Willman
The muX project at the Paul Scherrer Institut aims to perform high-resolution muonic atom X-ray spectroscopy for the extraction of nuclear charge radii of radioactive isotopes that can be handled only in microgram quantities. Measurements of the absolute charge radii of high-Z radioactive elements are complementary to the measurements of relative differences in mean-square radii along the isotopic chain available from laser spectroscopy. One of the major limitations of atomic structure calculations is related with the uncertainty of the nuclear charge radius. This is the case for the extraction of the Weinberg angle from atomic parity violation in Ra-226. A new approach to solve previous limitations of muonic atom X-ray spectroscopy experiments is the application of multiple muon transfer reactions in a high-pressure hydrogen gas cell with a small admixture of deuterium. The validity of this method has been demonstrated with a measurement with only 5 mu g of gold.
Paul Scherrer研究所的muX项目旨在执行高分辨率的介子原子x射线光谱学，以提取放射性同位素的核电荷半径，这些同位素只能以微克为单位进行处理。测量高z放射性元素的绝对电荷半径与激光光谱测量沿同位素链的均方半径的相对差异是互补的。原子结构计算的一个主要限制与核电荷半径的不确定性有关。这就是从Ra-226的原子宇称破坏中提取温伯格角的情况。解决以往介子原子x射线光谱实验局限性的新方法是在含有少量氘的高压氢气池中应用多个介子转移反应。仅用5 μ g金的测量就证明了这种方法的有效性。
{"title":"Towards nuclear structure with radioactive muonic atoms : The nuclear charge radius of radioactive isotopes from measurements of muonic X-rays","authors":"A. Skawran, A. Adamczak, A. Antognini, N. Berger, T. Cocolios, R. Dressler, C. Düllmann, R. Eichler, P. Indelicato, K. Jungmann, K. Kirch, A. Knecht, J. Krauth, J. Nuber, A. Papa, R. Pohl, M. Pospelov, E. Rapisarda, D. Renisch, P. Reiter, N. Ritjoho, S. Roccia, N. Severijns, S. Vogiatzi, F. Wauters, L. Willman","doi":"10.1393/NCC/I2019-19125-7","DOIUrl":"https://doi.org/10.1393/NCC/I2019-19125-7","url":null,"abstract":"The muX project at the Paul Scherrer Institut aims to perform high-resolution muonic atom X-ray spectroscopy for the extraction of nuclear charge radii of radioactive isotopes that can be handled only in microgram quantities. Measurements of the absolute charge radii of high-Z radioactive elements are complementary to the measurements of relative differences in mean-square radii along the isotopic chain available from laser spectroscopy. One of the major limitations of atomic structure calculations is related with the uncertainty of the nuclear charge radius. This is the case for the extraction of the Weinberg angle from atomic parity violation in Ra-226. A new approach to solve previous limitations of muonic atom X-ray spectroscopy experiments is the application of multiple muon transfer reactions in a high-pressure hydrogen gas cell with a small admixture of deuterium. The validity of this method has been demonstrated with a measurement with only 5 mu g of gold.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88981293","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 : 2019-04-23DOI: 10.1393/NCC/I2018-18194-4
K. Schmidt, R. Wada, G. Viesti, C. Botosso, J. Natowitz, T. Keutgen, Hua Zheng, A. Bonasera, K. Hagel, A. Kumar, G. Giuliani, M. Barbui, M. Huang, G. Liu, G. Zhang, J. Gauthier, E. Kim, N. Blando, Y. Masri, G. Prete, S. Pesente, D. Fabris, X. Cao, M. Rodrigues, S. Kowalski, S. Moretto, S. Wuenschel
{"title":"Temperature and density of hot decaying 40Ca and 28Si","authors":"K. Schmidt, R. Wada, G. Viesti, C. Botosso, J. Natowitz, T. Keutgen, Hua Zheng, A. Bonasera, K. Hagel, A. Kumar, G. Giuliani, M. Barbui, M. Huang, G. Liu, G. Zhang, J. Gauthier, E. Kim, N. Blando, Y. Masri, G. Prete, S. Pesente, D. Fabris, X. Cao, M. Rodrigues, S. Kowalski, S. Moretto, S. Wuenschel","doi":"10.1393/NCC/I2018-18194-4","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18194-4","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73043378","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 : 2019-03-12DOI: 10.1393/NCC/I2019-19248-9
G. Graziani
Collisions with ion and proton beams at the LHC provide a testbed to study strongly interacting matter at the most extreme density and temperature presently achievable at accelerators. The ATLAS, CMS and LHCb experiments,though not designed specifically for heavy ion physics, are providing unique inputs to this rich phenomenology. Recent results from the three experiments are reviewed,covering in particular measurements with heavy flavour and electromagnetic probes,and the first results from fixed-target collisions obtained by LHCb.
{"title":"Heavy Ion and Fixed-Target Physics at ATLAS, CMS and LHCb","authors":"G. Graziani","doi":"10.1393/NCC/I2019-19248-9","DOIUrl":"https://doi.org/10.1393/NCC/I2019-19248-9","url":null,"abstract":"Collisions with ion and proton beams at the LHC provide a testbed to study strongly interacting matter at the most extreme density and temperature presently achievable at accelerators. The ATLAS, CMS and LHCb experiments,though not designed specifically for heavy ion physics, are providing unique inputs to this rich phenomenology. Recent results from the three experiments are reviewed,covering in particular measurements with heavy flavour and electromagnetic probes,and the first results from fixed-target collisions obtained by LHCb.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83455567","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 : 2019-01-01DOI: 10.1393/NCC/I2018-18164-X
E. Filippo, N. Martorana, G. Lanzalone, L. Acosta, L. Auditore, B. Gnoffo, D. Dell’Aquila, G. Cardella, C. Maiolino, G. Saccâ, F. Rizzo, G. Politi, A. Castoldi, C. Guazzoni, P. Russotto, I. Lombardo, A. Trifirò, T. Parsani, M. Trimarchi, A. Pagano, L. Quattrocchi, S. Luca, M. Papa, F. Porto, F. Favela, E. Pagano, S. Pirrone
Summary. — The experimental activity with the CHIMERA 4 π detector in the last two years is reviewed in the light of the most recent technical achievements of the device. In fact the CHIMERA detector capabilities are going to be extended with the implementation of a new digital front-end electronics and the coupling with the FARCOS ancillary correlator array. The device has reached a sufficient versatil-ity in order to obtain results for different and specific data analysis with stable and radioactive heavy ion beams, e.g. , pygmy resonances, nuclear reactions of astrophysical interest, nuclear dynamics and study of the nuclear matter through the isospin degree of freedom. The obtained results and the expected future performances will be briefly discussed.
{"title":"Results and recent advances with the CHIMERA and FARCOS detectors","authors":"E. Filippo, N. Martorana, G. Lanzalone, L. Acosta, L. Auditore, B. Gnoffo, D. Dell’Aquila, G. Cardella, C. Maiolino, G. Saccâ, F. Rizzo, G. Politi, A. Castoldi, C. Guazzoni, P. Russotto, I. Lombardo, A. Trifirò, T. Parsani, M. Trimarchi, A. Pagano, L. Quattrocchi, S. Luca, M. Papa, F. Porto, F. Favela, E. Pagano, S. Pirrone","doi":"10.1393/NCC/I2018-18164-X","DOIUrl":"https://doi.org/10.1393/NCC/I2018-18164-X","url":null,"abstract":"Summary. — The experimental activity with the CHIMERA 4 π detector in the last two years is reviewed in the light of the most recent technical achievements of the device. In fact the CHIMERA detector capabilities are going to be extended with the implementation of a new digital front-end electronics and the coupling with the FARCOS ancillary correlator array. The device has reached a sufficient versatil-ity in order to obtain results for different and specific data analysis with stable and radioactive heavy ion beams, e.g. , pygmy resonances, nuclear reactions of astrophysical interest, nuclear dynamics and study of the nuclear matter through the isospin degree of freedom. The obtained results and the expected future performances will be briefly discussed.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83966426","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 : 2019-01-01DOI: 10.1393/NCC/I2019-19146-2
C. Gabbaninion
{"title":"The g - 2 experiment","authors":"C. Gabbaninion","doi":"10.1393/NCC/I2019-19146-2","DOIUrl":"https://doi.org/10.1393/NCC/I2019-19146-2","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76835721","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 : 2019-01-01DOI: 10.1393/ncc/i2019-19054-5
N. Smirnova
{"title":"Isospin-symmetry breaking in nuclear structure","authors":"N. Smirnova","doi":"10.1393/ncc/i2019-19054-5","DOIUrl":"https://doi.org/10.1393/ncc/i2019-19054-5","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74642786","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 : 2019-01-01DOI: 10.1393/ncc/i2019-19076-y
P. Gangi
{"title":"Results of the 1 tonne × year WIMP search with XENON1T","authors":"P. Gangi","doi":"10.1393/ncc/i2019-19076-y","DOIUrl":"https://doi.org/10.1393/ncc/i2019-19076-y","url":null,"abstract":"","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75449632","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 : 2018-11-01DOI: 10.1393/NCC/I2017-17198-X
L. Selbuz, M. Frank, I. Turan
— We examine the sensitivity of the particle spectrum to the parameters of the U(1)′-extended MSSM with R-parity violation. This model provides a simultaneous solution to both the μ-problem and the proton decay problem which plague the MSSM. We focus on variations of neutralino, chargino and Higgs boson masses in various lepton number violations couplings, scanning over all the space to find allowed regions of the parameter space consistent with the experimental constraints for these masses.
{"title":"Higgs, chargino and neutralino mass spectra in RPV U(1)′ model","authors":"L. Selbuz, M. Frank, I. Turan","doi":"10.1393/NCC/I2017-17198-X","DOIUrl":"https://doi.org/10.1393/NCC/I2017-17198-X","url":null,"abstract":"— We examine the sensitivity of the particle spectrum to the parameters of the U(1)′-extended MSSM with R-parity violation. This model provides a simultaneous solution to both the μ-problem and the proton decay problem which plague the MSSM. We focus on variations of neutralino, chargino and Higgs boson masses in various lepton number violations couplings, scanning over all the space to find allowed regions of the parameter space consistent with the experimental constraints for these masses.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85965424","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/i2017-17192-4
V. Kozhuharov
— Massive photon-like particles are predicted in many extensions of the Standard Model with a hidden sector accounting for dark matter candidates. They have interactions similar to the photon, are vector bosons, and can be produced together with photons. Most of the present experimental constraints on the dark photon (A) rely on the hypothesis of dominant decays to lepton pairs. The PADME experiment aims at searching for the e+e− → γA process in a positron-on-target experiment, assuming a decay of the A into invisible particles of the hidden sector. The positron beam of the DAΦNE Beam-Test Facility (BTF), produced by the LINAC at the Laboratori Nazionali di Frascati of INFN, will be used. The core of the experimental apparatus is a fine-grained, high-resolution calorimeter. It will measure with high precision the momentum of the photon in events with no other activity in the detector, thus allowing to measure the A mass as the missing mass in the final state. In about one year data taking, a sensitivity on the interaction strength ( 2 parameter) down to 10−6 is achievable, in the mass region from 1 MeV < MA < 23.7 MeV, running with 6000 positrons in 40 ns long bunches at 550 MeV beam energy. The experiment, now in the construction phase, is planned to run in 2018. The status of the PADME detector and the physics potential of PADME is reviewed.
-在标准模型的许多扩展中预测了大质量的光子样粒子，其中隐藏的部分占暗物质候选者。它们具有与光子类似的相互作用，是矢量玻色子，可以与光子一起产生。目前大多数关于暗光子(A)的实验约束都依赖于显性衰变到轻子对的假设。PADME实验的目的是在正电子非靶实验中寻找e+e−→γA过程，假设a衰变为隐藏扇区的不可见粒子。将使用国际核物理研究所弗拉斯卡蒂国家实验室的直线加速器生产的DAΦNE光束测试设备(BTF)的正电子束。实验装置的核心是一个细粒度、高分辨率的量热计。它将在探测器中没有其他活动的事件中高精度地测量光子的动量，从而允许测量A质量作为最终状态中的缺失质量。在大约一年的数据采集中，在1 MeV < MA < 23.7 MeV的质量区域，6000个正电子以550 MeV的束流能量在40 ns长束中运行，对相互作用强度(2个参数)的灵敏度降低到10−6。该实验目前处于建设阶段，计划于2018年运行。综述了PADME探测器的研究现状和PADME的物理潜力。
{"title":"PADME: Searching for dark mediator at the Frascati BTF","authors":"V. Kozhuharov","doi":"10.1393/ncc/i2017-17192-4","DOIUrl":"https://doi.org/10.1393/ncc/i2017-17192-4","url":null,"abstract":"— Massive photon-like particles are predicted in many extensions of the Standard Model with a hidden sector accounting for dark matter candidates. They have interactions similar to the photon, are vector bosons, and can be produced together with photons. Most of the present experimental constraints on the dark photon (A) rely on the hypothesis of dominant decays to lepton pairs. The PADME experiment aims at searching for the e+e− → γA process in a positron-on-target experiment, assuming a decay of the A into invisible particles of the hidden sector. The positron beam of the DAΦNE Beam-Test Facility (BTF), produced by the LINAC at the Laboratori Nazionali di Frascati of INFN, will be used. The core of the experimental apparatus is a fine-grained, high-resolution calorimeter. It will measure with high precision the momentum of the photon in events with no other activity in the detector, thus allowing to measure the A mass as the missing mass in the final state. In about one year data taking, a sensitivity on the interaction strength ( 2 parameter) down to 10−6 is achievable, in the mass region from 1 MeV < MA < 23.7 MeV, running with 6000 positrons in 40 ns long bunches at 550 MeV beam energy. The experiment, now in the construction phase, is planned to run in 2018. The status of the PADME detector and the physics potential of PADME is reviewed.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81147474","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：