The TOTEM Experiment at the CERN Large Hadron Collider

Collaboration, The TOTEM; Anelli, G.; Antchev, G.; Aspell, P.; Avati, V.; Bagliesi, Maria Grazia; Berardi, V.; Berretti, M.; Boccone, V.; Bottigli, U.; Bozzo, M.; Brücken, E.; Buzzo, A.; Cafagna, F.; Calicchio, M.; Capurro, F; Catanesi, M. G.; Catastini, P.; Cecchi, Roberto; Cerchi, S.; Cereseto, R.; Ciocci, M. A.; Cuneo, S.; Viá, C. Da; David, E.; Deile, M.; Dimovasili, E.; Doubrava, M.; Eggert, K.; Eremin, V.; Ferro, F.; Foussat, A.; Galuska, Martin; García, F.; Gherarducci, F.; Gianì, S.; Greco, V.; Hasi, J.; Haug, F.; Heino, J.; Hilden, T. E.; Jarron, P.; Joram, C.; Kalliopuska, J.; Kapłon, J.; Kašpar, J.; Kundrát, V.; Kurvinen, K.; Lacroix, J M; Lami, S.; Latino, G.; Lauhakangas, R.; Lippmaa, É.; Lokajı́ček, M.; Vetere, M. Lo; Rodríguez, F. Lucas; Macina, D.; Macrı́, M.; Magazzù, C.; Magazzù, G.; Magri, A; Maire, G.; Manco, A.; Meucci, M.; Minutoli, S.; Morelli, Alessandro; Musico, P.; Negri, Marco; Niewiadomski, H.; Noschis, E.; Notarnicola, G.; Oliveri, E.; Oljemark, F.; Orava, R.; Oriunno, M.; Perrot, A. L.; Österberg, K.; Paoletti, R.; Pedreschi, E.; Petäjäjärvi, Juha; Pollovio, P.; Quinto, M.; Radermacher, E.; Radicioni, E.; Rangod, S.; Ravotti, F.; Rella, G.; Robutti, E.; Ropelewski, L.; Ruggiero, G.; Rummel, A.; Saarikko, H.; Sanguinetti, G.; Santroni, A.; Scribano, A.; Sette, G.; Snoeys, W.; Spinella, F.; Squillacioti, P.; Ster, A.; Taylor, C.; Tazzioli, A.; Torazza, D; Trovato, A.; Trummal, Aleksander; Turini, N.; Vacek, V.; Remortel, N. Van; Vinš, Václav; Watts, S.; Whitmore, J.; Wu, J.

doi:10.1088/1748-0221/3/08/s08007

Cited by 120 publications

(54 citation statements)

References 50 publications

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“…Due to limited radiation hardness, the ALFA detector will be used only during the dedicated runs. It is worth mentioning that at the LHC, apart from ALFA, there are also similar stations of the TOTEM [10] experiment placed around the CMS central detector. Although, the present study was carried out for ALFA and ATLAS, similar results can be expected for TOTEM and CMS.…”

Section: Methodsmentioning

confidence: 99%

Untitled

Staszewski¹,

Lebiedowicz²,

Trzebiński³

et al. 2011

Acta Phys. Pol. B

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A process of central exclusive π + π − production in proton-proton collisions and its theoretical description is presented. A possibility of its measurement, during the special low luminosity LHC runs, with the help of the ATLAS central detector for measuring pions and the ALFA stations for tagging the scattered protons is studied. A visible cross-section is estimated to be 21 µb for √ s = 7 TeV, which gives over 2000 events for 100 µb −1 of integrated luminosity. Differential distributions in pion pseudorapidities, pion and proton transverse momenta as well as π + π − invariant mass are shown and discussed.

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Section: Methodsmentioning

confidence: 99%

Untitled

Staszewski¹,

Lebiedowicz²,

Trzebiński³

et al. 2011

Acta Phys. Pol. B

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“…Minimum bias events were triggered by requiring at least one track candidate in either of the TOTEM [10] T2 telescopes, placed symmetrically at 14 m both sides of the interaction point, covering a pseudorapidity range 5.3 < |η| < 6.5. The analysis presented here follows the procedure described in Ref.…”

Section: Pos(dis2015)158mentioning

confidence: 99%

Testing QCD with jets measured by CMS down to very low-pt and into the forward phase space

Spilbeeck¹

2016

Proceedings of XXIII International Workshop on Deep-Inelastic Scattering — PoS(DIS2015)

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The production yields of leading charged-article jets and charged particles in proton-proton collisions are measured at √ s = 8 TeV based on a data sample collected with the CMS detector and corresponding to an integrated luminosity of 45 µb −1 . The charged-particle jets (charged particles) are measured in the pseudorapidity range |η| < 1.9(2.4) for transverse momenta p T > 1(0.8) GeV. The measured yields integrated above a given minimum transverse momentum, p T min , provide information on the mechanism by which the underlying parton-parton cross sections are unitarised when approaching the low-p T non-perturbative domain. Comparisons to predictions obtained from various Monte Carlo event generators, show that the measured observable has a large sensitive to the underlying physics.

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“…The Total elastic and diffractive cross-section measurement experiment (TOTEM) [171] consists of 4 detector pairs at different positions on either side of the CMS experiment at very small angles to the beam pipe in order to capture so-called forward physics that escape the larger detectors. It studies the structure of the proton while at the same time monitoring the LHC luminosity.…”

Section: The Lhc Experimentsmentioning

confidence: 99%

Search for Dark Matter with ATLAS

Pöttgen¹

2016

Springer Theses

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Any physics analysis at a collider experiment heavily relies on an efficient trigger system to filter out potentially interesting events. To ensure stable operation, a continuous and detailed real-time monitoring is essential. Two such online monitoring features for the Central Trigger of the ATLAS experiment at the Large Hadron Collider (LHC) at the European centre for particle physics, CERN, are developed as part of this thesis and are presented in detail. To prepare the ATLAS experiment for the second run of the LHC starting in 2015, among other systems the Central Trigger hardware will be upgraded to remove resource limitations and allow for the connection of newly installed systems. This thesis reports on the corresponding changes and extensions in the simulation of the Central Trigger, the implementation of which is part of this work. A further part of this thesis presents a search for Dark Matter candidates. Cosmological observations indicate that about 80% of the matter content of the universe consist of a form of non-luminous matter which is traceable only due to its gravitational interaction and for which the Standard Model of particle physics does not provide a viable candidate. A number of experiments searches for evidence of Weakly Interacting Massive Particles (WIMPs), that in a natural way could account for the observed present day abundance of this Dark Matter. In recent years, also the search for WIMP pair production at hadron colliders has gathered momentum. A possible signal signature at a collider is a jet originating from initial state radiation and recoiling against a pair of WIMPs, leading to events with a highly energetic jet and a large amount of missing transverse momentum due to the WIMPs leaving the detector without interacting. The signal is thus expected to manifest itself as an excess above the Standard Model prediction at large missing transverse energy (E miss T ). The search for WIMP candidates presented in this thesis uses such mono-jet events, based on 20 fb −1 of proton-proton collision data collected in 2012 with the ATLAS detector at a centreof-mass energy of √ s = 8 TeV. The main Standard Model backgrounds are estimated in a semi-data driven way. The event selection is optimised with respect to the sensitivity for a WIMP signal and the search is performed in eight signal regions of increasing E miss T . No significant excess is observed and model independent limits both at 90% and 95% confidence level (CL) are set on the cross section for new physics. In addition, 90% CL limits are derived on the suppression scale of an effective field theory (EFT) for various operators and compared to the results from other search experiments. The collider limits for all considered effective operators are stronger than the bounds from other experiments at low WIMP masses in the case of spinindependent interactions, and over a large mass range for spin-dependent interactions. In the light of concerns about the applicability of an EFT at LHC energies, the results are furthermore int...

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The TOTEM Experiment at the CERN Large Hadron Collider

Cited by 120 publications

References 50 publications

Untitled

Untitled

Testing QCD with jets measured by CMS down to very low-pt and into the forward phase space

Search for Dark Matter with ATLAS

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