CERN Accelerating science

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Ultimi arrivi:
2022-06-30
04:11
The hadronic nucleus-nucleus cross section and the nucleon size / Nijs, Govert (MIT, Cambridge, CTP) ; van der Schee, Wilke (CERN)
Even though the total hadronic nucleus-nucleus cross section is among the most fundamental observables, it has only recently been measured precisely for lead-lead collisions at the LHC. [...]
arXiv:2206.13522 ; CERN-TH-2022-103;MIT-CTP/5445.
- 5 p.
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2022-06-30
04:11
Spinning Sum Rules for the Dimension-Six SMEFT / Remmen, Grant N. (Santa Barbara, KITP ; UC, Santa Barbara) ; Rodd, Nicholas L. (CERN)
We construct new dispersive sum rules for the effective field theory of the standard model at mass dimension six. [...]
arXiv:2206.13524 ; CERN-TH-2022-105.
- 51 p.
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2022-06-29
05:27
Inflation, space-borne interferometers and the expansion history of the Universe / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
According to the common wisdom, between a fraction of the mHz and few Hz the spectral energy density of the inflationary gravitons can be safely disregarded even assuming the most optimistic sensitivities of the space-borne detectors. [...]
arXiv:2206.08217.
- 27 p.
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2022-06-29
05:25
Theory uncertainties in the fiducial Drell-Yan cross section and distributions / Chen, Xuan (KIT, Karlsruhe, TP ; KIT, Karlsruhe, IAP) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (Milan Bicocca U. ; INFN, Milan Bicocca ; Annecy, LAPTH) ; Rottoli, Luca (Zurich U.) ; Torrielli, Paolo (INFN, Turin ; Turin U.)
In these proceedings we study various sources of theoretical uncertainty in the Drell-Yan $p_T^{{\ell\ell}}$ spectrum focussing on the $p_T^{{\ell\ell}} \lesssim 100\, {\rm GeV}$ region. [...]
arXiv:2206.11059.
- 6 p.
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2022-06-29
05:02
A standard convention for particle-level Monte Carlo event-variation weights / Bothmann, Enrico (Gottingen U.) ; Buckley, Andy (Glasgow U.) ; Gütschow, Christian (University Coll. London) ; Prestel, Stefan (Lund U.) ; Schönherr, Marek (Durham U., IPPP) ; Skands, Peter (Monash U.) ; Andersen, Jeppe (Durham U., IPPP) ; Bhattacharya, Saptaparna (Northwestern U.) ; Butterworth, Jonathan (University Coll. London) ; Chahal, Gurpreet Singh (Durham U., IPPP) et al.
Streams of event weights in particle-level Monte Carlo event generators are a convenient and immensely CPU-efficient approach to express systematic uncertainties in phenomenology calculations, providing systematic variations on the nominal prediction within a single event sample. [...]
arXiv:2203.08230 ; MCNET-22-00.
- 11 p.
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2022-06-29
04:58
Causality constraints on nonlinear supersymmetry / Bonnefoy, Quentin (DESY) ; Casagrande, Gabriele ; Dudas, Emilian (Ecole Polytechnique, CPHT ; CERN)
It is well-known that gravitino propagation in standard supergravities is free of any causality problems. [...]
arXiv:2206.13451 ; DESY-22-103 ; CPHT-RR040.062022 ; CERN-TH-2022-096.
- 28 p.
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2022-06-29
04:55
Upgrade of the ALICE experiment beyond LHC Run 3 / Colella, Domenico (INFN, Bari)
The ALICE Collaboration completed the upgrade of the detector and is now commissioning for the beginning of the data taking during LHC Run 3. [...]
arXiv:2206.13247.
- 13 p.
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2022-06-29
04:49
Energy deposition studies in the LHCb insertion region from the validation to a step into the Hilumi challenge / Ciccotelli, Alessia (Manchester U. ; CERN) ; Appleby, Robert B. (Manchester U.) ; Cerutti, Francesco (CERN) ; Bilko, Kacper (CERN) ; Esposito, Luigi Salvatore (CERN) ; Garcia Alia, Ruben (CERN) ; Lechner, Anton (CERN) ; Tsinganis, Andrea (CERN)
The LHCb (Large Hadron Collider beauty) experiment at CERN aims at achieving a significantly higher luminosity than originally planned by means of two major upgrades: the Upgrade I that took place during the Long Shutdown 2 (LS2) and the Upgrade II foreseen for LS4. [...]
arXiv:2205.15645.
- 13 p.
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2022-06-27
18:08
Performance of highly irradiated FBK 3D and planar pixel detectors / Ceccarelli, Rudy (INFN, Florence ; Florence U.) /CMS Collaboration
The High Luminosity upgrade of the CERN Large Hadron Collider (HL-LHC) requires new radiation tolerant silicon pixel sensors. In the case of the CMS experiment, the first layer of pixel detectors will be installed at about 3 cm from the beam line, where an integrated fluence of about $2\times10^{16} \mathrm{n_{eq}cm^{-2}}$ (1 MeV equivalent neutrons) is expected (HL-LHC Runs 4 and 5). The first tracker layer will be substituted before the start of HL-LHC Run 6. The 3D concept for silicon pixel sensors presents several advantages with respect to traditional (planar) sensors. Thanks to short anode-to-cathode distances, 3D sensors are much more resistant to radiation damage, making them suitable for use in the inner layer of the future tracker. This paper describes results from beam tests with highly irradiated planar and 3D sensor and RD53A readout chip combinations. RD53A is the first prototype in 65 nm technology developed by the RD53 collaboration for use in HL-LHC pixel detectors. The sensors were made in FBK foundry in Trento, Italy, and their development was done in collaboration with INFN (Istituto Nazionale di Fisica Nucleare, Italy). Both planar and 3D sensors feature a pixel area of $2500$ $\mu\mathrm{m^2}$ and an active thickness of 150 $\mu$m. The pixel detectors, irradiated to fluences up to $2.4\times10^{16} \mathrm{n_{eq}cm^{-2}}$, were tested in the DESY test beam facility and the analysis of the data shows excellent performances even for the highest irradiation fluences. All results are obtained in the framework of the CMS R\&D; activities..
CMS-CR-2022-075.- Geneva : CERN, 2022 - 3 p. Fulltext: PDF;
In : 15th Pisa Meeting on Advanced Detectors, La Biodola - Isola D'elba, It, 22 - 28 May 2022

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2022-06-27
18:07
The CMS Precision Proton Spectrometer precision timing with scCVD diamond crystals. / Bossini, Edoardo (INFN, Pisa ; Pisa U.) /CMS and TOTEM Collaborations
The CMS Proton Precision Spectrometer (PPS), operating at the LHC, makes use of 3D silicon tracking stations to measure the kinematics of protons scattered in the very forward region, as well as timing detectors based on planar single crystal CVD diamond to measure the proton time-of-arrival with high precision. The time information is used to reconstruct the longitudinal position of the proton interaction vertex and to suppress pile-up background. [...]
CMS-CR-2022-074.- Geneva : CERN, 2022 - 3 p. Fulltext: PDF;
In : 15th Pisa Meeting on Advanced Detectors, La Biodola - Isola D'elba, It, 22 - 28 May 2022

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