Riccardo Di Sipio | Università di Bologna (original) (raw)

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Papers by Riccardo Di Sipio

Abstract Nearly 50 years ago, theoretical physicists proposed that a field permeates the universe... more Abstract Nearly 50 years ago, theoretical physicists proposed that a field permeates the universe and gives energy to the vacuum. This field was required to explain why some, but not all, fundamental particles have mass.

The results obtained by the Slim5 collaboration on a low material budget tracking silicon demonst... more The results obtained by the Slim5 collaboration on a low material budget tracking silicon demonstrator put on a 12GeV/c proton test beam at CERN are reported. Inside a reference telescope, two different and innovative detectors were placed for careful tests. The first was a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS Technology, square pixels 50μm wide, thinned down to 100μm and equipped with a digital sparsified readout running up to 50MHz.

Skip to main content. CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bullet... more Skip to main content. CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bulletin; EDMS. Main navigation links: Search; Submit; Help; Your CDS: Your alerts; Your baskets; Your searches. login. Home > Top Quark Properties at ATLAS. Information; Discussion (0); Files. Internal Note. Report number, ATL-PHYS-SLIDE-2012-274. Title, Top Quark Properties at ATLAS. Author(s), Di Sipio, R (University of Bologna). Corporate author(s), The ATLAS collaboration.

Figure 1 Where to hunt for the Higgs? The standard model predicts the probability (or “branching ... more Figure 1 Where to hunt for the Higgs? The standard model predicts the probability (or “branching ratio” denoted BR) that a Higgs boson will decay into a particular set of final state particles.

proton–proton collision data recorded by the ATLAS detector at the Large Hadron Collider to searc... more proton–proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.

Inclusive charged-particle distributions have been measured in proton-proton (pp) collisions at t... more Inclusive charged-particle distributions have been measured in proton-proton (pp) collisions at the LHC for different center-of-mass energies [1–7]. These measurements provide insight into the strong interaction (QCD) at low energy scales and show that predictions of current phenomenological models cannot fully describe the measured observables in all kinematic regions. As shown in Ref.[2], the limitation of models is particularly apparent when particles with low transverse momentum (pT< 500 MeV) are studied.

Skip to main content. Help us improve the CERN Document Server for you: take part! CERN Logo CERN... more Skip to main content. Help us improve the CERN Document Server for you: take part! CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bulletin; EDMS. Main navigation links: Search; Submit; Help; Your CDS: Your alerts; Your baskets; Your searches. login. Home > Top physics at the LHC. Information; Discussion; Files. Internal Note. Report number, ATL-PHYS-SLIDE-2011-638. Title, Top physics at the LHC. Author(s), Di Sipio, R (University of Bologna).

АННОТАЦИЯ: В статье дается характеристика служебных слов. Описывается специфика союзов как средст... more АННОТАЦИЯ: В статье дается характеристика служебных слов. Описывается специфика союзов как средства выражения каузальных отношений. В качестве примера рассматриваются английский союз because и французский parce que. Сопоставляется использование данных союзов в предложениях с причинно-следственными связями. Вы-деляется специфика данных союзов.

Abstract: Mass and angular distributions of dijets produced in LHC proton-proton collisions at a ... more Abstract: Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy sqrt (s)= 7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated luminosity of 4.8/fb. Dijet masses up to 4.0 TeV have been probed. No resonance-like features have been observed in the dijet mass spectrum, and all angular distributions are consistent with the predictions of QCD.

Abstract The paper describes a mixed-mode ASIC composed of a fast readout architecture that inter... more Abstract The paper describes a mixed-mode ASIC composed of a fast readout architecture that interfaces with a matrix of 4096 Monolithic Active Pixel Sensors (MAPS). The matrix has 128 columns and 32 rows of pixels and is divided into 256 regions of 4 times 4 pixels, named macro-pixels (MPs). The chip is an upgrade of a smaller version having 256 pixels that was designed and tested. The two chips were designed via STM 130 nm CMOS technology. The pixel dimension is 50 by 50 mum 2.

In September 2008 the Slim5 collaboration submitted a low material budget silicon demonstrator to... more In September 2008 the Slim5 collaboration submitted a low material budget silicon demonstrator to test with protons at the PS beam at CERN. The beam test setup was composed of a four double sided microstrip reference telescope and different detectors (DUTs) placed inside: a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS Technology and a high resistivity double sided silicon detector, with short strips at 45∘ angle to the detectors edge, read out by the FSSR2 chip.

Abstract Modern experiments search for extremely rare processes hidden in much larger background ... more Abstract Modern experiments search for extremely rare processes hidden in much larger background levels. As the experiment complexity, the accelerator backgrounds and luminosity increase we need increasingly exclusive selections to efficiently select the rare events inside the huge background. We present a fast, high-quality, track-based event selection for the self-triggered SLIM5 silicon telescope.

A low material budget silicon demonstrator has been tested by the SLIM5 collaboration with 12GeV/... more A low material budget silicon demonstrator has been tested by the SLIM5 collaboration with 12GeV/c protons at the PS-T9 beam line at CERN. Two devices were placed inside a reference telescope and their characteristics were measured. The first was a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS technology, providing digital sparsified readout. The other one was a high resistivity double-sided silicon detector, with short strips at a 45∘ angle to the detector's edge, read out by the FSSR2 chip.

In September 2008 the SLIM5 collaboration submitted a low material budget silicon demonstrator to... more In September 2008 the SLIM5 collaboration submitted a low material budget silicon demonstrator to test with 12GeV/c protons, at the PS-T9 test-beam at CERN.

A prototype of a mixed-mode ASIC composed of a fast readout architecture that interfaces with a m... more A prototype of a mixed-mode ASIC composed of a fast readout architecture that interfaces with a matrix of 4096 Monolithic Active Pixel Sensor (MAPS) was fabricated via STM 130nm CMOS technology. Groups of 4× 4 pixels form a macro-pixel (MP). The readout architecture is parallel and could overcome the readout speed limit of big matrices. As the output port can only accept one-hit information at a time, an internal queuing system has been provided to face high hit-rate conditions.

Abstract Nearly 50 years ago, theoretical physicists proposed that a field permeates the universe... more Abstract Nearly 50 years ago, theoretical physicists proposed that a field permeates the universe and gives energy to the vacuum. This field was required to explain why some, but not all, fundamental particles have mass.

The results obtained by the Slim5 collaboration on a low material budget tracking silicon demonst... more The results obtained by the Slim5 collaboration on a low material budget tracking silicon demonstrator put on a 12GeV/c proton test beam at CERN are reported. Inside a reference telescope, two different and innovative detectors were placed for careful tests. The first was a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS Technology, square pixels 50μm wide, thinned down to 100μm and equipped with a digital sparsified readout running up to 50MHz.

Skip to main content. CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bullet... more Skip to main content. CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bulletin; EDMS. Main navigation links: Search; Submit; Help; Your CDS: Your alerts; Your baskets; Your searches. login. Home > Top Quark Properties at ATLAS. Information; Discussion (0); Files. Internal Note. Report number, ATL-PHYS-SLIDE-2012-274. Title, Top Quark Properties at ATLAS. Author(s), Di Sipio, R (University of Bologna). Corporate author(s), The ATLAS collaboration.

Figure 1 Where to hunt for the Higgs? The standard model predicts the probability (or “branching ... more Figure 1 Where to hunt for the Higgs? The standard model predicts the probability (or “branching ratio” denoted BR) that a Higgs boson will decay into a particular set of final state particles.

proton–proton collision data recorded by the ATLAS detector at the Large Hadron Collider to searc... more proton–proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model.

Inclusive charged-particle distributions have been measured in proton-proton (pp) collisions at t... more Inclusive charged-particle distributions have been measured in proton-proton (pp) collisions at the LHC for different center-of-mass energies [1–7]. These measurements provide insight into the strong interaction (QCD) at low energy scales and show that predictions of current phenomenological models cannot fully describe the measured observables in all kinematic regions. As shown in Ref.[2], the limitation of models is particularly apparent when particles with low transverse momentum (pT< 500 MeV) are studied.

Skip to main content. Help us improve the CERN Document Server for you: take part! CERN Logo CERN... more Skip to main content. Help us improve the CERN Document Server for you: take part! CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bulletin; EDMS. Main navigation links: Search; Submit; Help; Your CDS: Your alerts; Your baskets; Your searches. login. Home > Top physics at the LHC. Information; Discussion; Files. Internal Note. Report number, ATL-PHYS-SLIDE-2011-638. Title, Top physics at the LHC. Author(s), Di Sipio, R (University of Bologna).

АННОТАЦИЯ: В статье дается характеристика служебных слов. Описывается специфика союзов как средст... more АННОТАЦИЯ: В статье дается характеристика служебных слов. Описывается специфика союзов как средства выражения каузальных отношений. В качестве примера рассматриваются английский союз because и французский parce que. Сопоставляется использование данных союзов в предложениях с причинно-следственными связями. Вы-деляется специфика данных союзов.

Abstract: Mass and angular distributions of dijets produced in LHC proton-proton collisions at a ... more Abstract: Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy sqrt (s)= 7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated luminosity of 4.8/fb. Dijet masses up to 4.0 TeV have been probed. No resonance-like features have been observed in the dijet mass spectrum, and all angular distributions are consistent with the predictions of QCD.

Abstract The paper describes a mixed-mode ASIC composed of a fast readout architecture that inter... more Abstract The paper describes a mixed-mode ASIC composed of a fast readout architecture that interfaces with a matrix of 4096 Monolithic Active Pixel Sensors (MAPS). The matrix has 128 columns and 32 rows of pixels and is divided into 256 regions of 4 times 4 pixels, named macro-pixels (MPs). The chip is an upgrade of a smaller version having 256 pixels that was designed and tested. The two chips were designed via STM 130 nm CMOS technology. The pixel dimension is 50 by 50 mum 2.

In September 2008 the Slim5 collaboration submitted a low material budget silicon demonstrator to... more In September 2008 the Slim5 collaboration submitted a low material budget silicon demonstrator to test with protons at the PS beam at CERN. The beam test setup was composed of a four double sided microstrip reference telescope and different detectors (DUTs) placed inside: a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS Technology and a high resistivity double sided silicon detector, with short strips at 45∘ angle to the detectors edge, read out by the FSSR2 chip.

Abstract Modern experiments search for extremely rare processes hidden in much larger background ... more Abstract Modern experiments search for extremely rare processes hidden in much larger background levels. As the experiment complexity, the accelerator backgrounds and luminosity increase we need increasingly exclusive selections to efficiently select the rare events inside the huge background. We present a fast, high-quality, track-based event selection for the self-triggered SLIM5 silicon telescope.

A low material budget silicon demonstrator has been tested by the SLIM5 collaboration with 12GeV/... more A low material budget silicon demonstrator has been tested by the SLIM5 collaboration with 12GeV/c protons at the PS-T9 beam line at CERN. Two devices were placed inside a reference telescope and their characteristics were measured. The first was a 4k-Pixel Matrix of Deep N Well MAPS, developed in a 130nm CMOS technology, providing digital sparsified readout. The other one was a high resistivity double-sided silicon detector, with short strips at a 45∘ angle to the detector's edge, read out by the FSSR2 chip.

In September 2008 the SLIM5 collaboration submitted a low material budget silicon demonstrator to... more In September 2008 the SLIM5 collaboration submitted a low material budget silicon demonstrator to test with 12GeV/c protons, at the PS-T9 test-beam at CERN.

A prototype of a mixed-mode ASIC composed of a fast readout architecture that interfaces with a m... more A prototype of a mixed-mode ASIC composed of a fast readout architecture that interfaces with a matrix of 4096 Monolithic Active Pixel Sensor (MAPS) was fabricated via STM 130nm CMOS technology. Groups of 4× 4 pixels form a macro-pixel (MP). The readout architecture is parallel and could overcome the readout speed limit of big matrices. As the output port can only accept one-hit information at a time, an internal queuing system has been provided to face high hit-rate conditions.

In questo articolo verrà esposto il Modello Standard, e saranno discusse alcune teorie per la sua... more In questo articolo verrà esposto il Modello Standard, e saranno discusse alcune teorie per la sua estensione.