CERN Accelerating science

CERN Published Articles

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2017-07-26
06:24
Optical diffraction radiation for position monitoring of charged particle beams / Kieffer, R (CERN) ; Bravin, E (CERN) ; Lefevre, T (CERN) ; Mazzoni, S (CERN) ; Bergamaschi, M (Royal Holloway, U. of London) ; Karataev, P (Royal Holloway, U. of London) ; Kruchinin, K (Royal Holloway, U. of London) ; Billing, M (Cornell U., CLASSE) ; Conway, J (Cornell U., CLASSE) ; Shanks, J (Cornell U., CLASSE) et al.
In the framework of the future linear collider collaboration (CLIC, ILC), non-intercepting beam monitoring instruments are under development for very low emittance and high charge density beams. Optical diffraction radiation (ODR) was studied and developed during the last years focussing on beam size measurements. [...]
2017 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 402 (2017) 88-91 Fulltext: PDF;

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2017-07-26
06:24
Optimization of an hybrid positron source using channeling / Chaikovska, I (Orsay, LAL) ; Chehab, R (Orsay, LAL) ; Guler, H (Orsay, LAL) ; Sievers, P (CERN) ; Artru, X (Lyon, IPN) ; Chevallier, M (Lyon, IPN) ; Suwada, T (KEK, Tsukuba) ; Satoh, M (KEK, Tsukuba) ; Kamitani, T (KEK, Tsukuba) ; Furukawa, K (KEK, Tsukuba) et al.
The hybrid positron source made of a crystal-radiator, as a source of channeling radiation, and an amorphous converter is briefly described. Optimization of the heating effects and thermal shocks led to a granular converter made of small tungsten spheres. [...]
2017 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 402 (2017) 58-62

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2017-07-26
06:24
Overview of Recent ALICE Results / Lakomov, Igor (CERN) /ALICE
ALICE is one of the four main experiments at the Large Hadron Collider. It is dedicated to the study of the characteristics of the hot medium produced at large energy densities in heavy-ion collisions, which is called Quark-Gluon Plasma. [...]
2017 - 7 p. - Published in : 10.1142/9789813224568_0067
In : 17th Lomonosov Conference on Elementary Particle Physics, Moscow, Russia, 20 - 26 Aug 2015, pp.404-410

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2017-07-26
06:24
Recent Results from the LHCf Experiment / Menjo, H (Nagoya U.) ; Adriani, O (INFN, Florence ; Florence U.) ; Berti, E (INFN, Florence ; Florence U.) ; Bonechi, L (INFN, Florence) ; Bongi, M (INFN, Florence ; Florence U.) ; Castellini, G (IFAC, Florence) ; D'Alessandro, R (INFN, Florence ; Florence U.) ; del Prete, M (INFN, Florence ; Florence U.) ; Haguenauer, M (Ec. Polytech., Palaiseau (main)) ; Itow, Y (Nagoya U., Solar-Terrestrial Environ. Lab. ; KMI, Nagoya) et al.
The LHCf experiment is an unique dedicated experiment for measurement of very forward particle production relevant to cosmic-ray air shower developments. The LHCf measured the spectra for forward photons, neutral pions and neutrons at $\sqrt{s}$ = 7 TeV p–p collisions and the nuclear modification factor for forward neutral pions at $\sqrt{s}$ = 5 TeV p-Pb. [...]
2017 - 5 p. - Published in : JPS Conf. Proc. 15 (2017) 011001 External link: Fulltext

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2017-07-26
06:24
Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC / Pan, H (LBL, Berkeley) ; Anderssen, E (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Cheng, D W (LBL, Berkeley) ; Juchno, M (LBL, Berkeley) ; Ferracin, P (CERN) ; Felice, H (CEA, DSM, Saclay) ; Perez, J C (CERN) ; Prestemon, S O (LBL, Berkeley) ; Vallone, G (CERN)
Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC 520__
The Large Hadron Collider Luminosity upgrade(HiLumi) program requires new low-β triplet quadrupole magnets, called MQXF, in the Interaction Region (IR) to increase the LHC peak and integrated luminosity. The MQXF magnets, designed and fabricated in collaboration between CERN and the U.S. [...]

FERMILAB-PUB-16-606-TD.- 2017 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4004105 Fulltext: PDF; External link: FERMILABPUB
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4004105

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2017-07-25
06:03
Novel Muon Identification Algorithms for the LHCb upgrade / Cogoni, V (CERN ; INFN, Cagliari ; Cagliari U.)
After the second Long Shutdown of the LHC scheduled for 2020, LHCb will operate at an istantaneous luminosity of $2·10^{33} cm^{−2}s^{−1}$ and at a centre of mass energy of 14 TeV. In this context, an overview of the possible new algorithms for the muon identification for the LHCb Upgrade is illustrated here. [...]
2017 - 3 p. - Published in : Nuovo Cimento C: 40 (2017) , no. 1, pp. 44 Fulltext: PDF;
In : 15th Incontri di Fisica delle Alte Energie, Genoa, Italy, 30 Mar - 1 Apr 2016, pp.44

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2017-07-25
06:03
b-hadron semileptonic decays with $\tau$ leptons in final states in LHCb / Gianluca Siddi, Benedetto (CERN ; INFN, Ferrara ; Ferrara U.) /LHCb
Lepton universality, described in the Standard Model, predicts equal coupling between gauge bosons and the three lepton families. SM extensions give additional interactions, implying in some cases a stronger coupling with the third generation of leptons. [...]
2017 - 3 p. - Published in : Nuovo Cimento C: 40 (2017) , no. 1, pp. 40 Fulltext: PDF;
In : 15th Incontri di Fisica delle Alte Energie, Genoa, Italy, 30 Mar - 1 Apr 2016, pp.40

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2017-07-25
06:03
Prototyping of hybrids and modules for the forward silicon strip tracking detector for the ATLAS Phase-II upgrade / Kuehn, S (CERN) ; Benítez, V (Barcelona, Inst. Microelectron.) ; Fernández-Tejero, J (Barcelona, Inst. Microelectron.) ; Fleta, C (Barcelona, Inst. Microelectron.) ; Lozano, M (Barcelona, Inst. Microelectron.) ; Ullán, M (Barcelona, Inst. Microelectron.) ; Lacker, H (Humboldt U., Berlin) ; Rehnisch, L (Humboldt U., Berlin) ; Sperlich, D (Humboldt U., Berlin) ; Ariza, D (DESY) et al.
For the High-Luminosity upgrade of the Large Hadron Collider an increased instantaneous luminosity of up to 7.5 ⋅ $10^{34} cm^{−2} s^{−1}$, leading to a total integrated luminosity of up to 3000 $fb^{−1}$, is foreseen. The current silicon and transition radiation tracking detectors of the ATLAS experiment will be unable to cope with the increased track densities and radiation levels, and will need to be replaced. [...]
2017 - 27 p. - Published in : JINST 12 (2017) P05015

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2017-07-25
06:03
Highlights from ALICE / Giubellino, Paolo (INFN, Turin ; CERN)
The LHC has delivered for the first time collisions of Nuclei in November 2010, at an energy of 2.76 TeV per nucleon pair, which represents a jump of more than an order of magnitude over the highest energy nuclear collisions ever studied before. The high energy, the quality of the state-of-the art detectors, and the readiness of the experimental collaborations at the LHC have allowed a rich harvest of important scientific results. [...]
2017 - 20 p. - Published in : Subnucl. Ser. 52 (2017) 249-268

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2017-07-25
06:03
Complexity and new Physics / Zichichi, Antonino (Vatican Pontifical Acad. Sci. ; INFN, Bologna ; U. Bologna, DIFA ; CERN ; Enrico Fermi Ctr., Rome ; World Lab., Geneva)
Complexity is ill-defined: more than 60 definitions of Complexity exist. The simplest one is not followed by the Logic of Nature: two examples are GUT and Supersymmetry. [...]
2017 - 20 p. - Published in : Subnucl. Ser. 52 (2017) 343-362

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