2,420 research outputs found
Forward dijet production at the LHC within an impact parameter dependent TMD approach
No full textDeganutti F, Royon C, Schlichting S. Forward dijet production at the LHC within an impact parameter dependent TMD approach. Journal of High Energy Physics. 2024;(1): 159.We investigate possible signatures of gluon saturation using forward p + A -> j + j + X di-jet production processes at the Large Hadron Collider. In the forward rapidity region, this is a highly asymmetric process where partons with large longitudinal momentum fraction x in the dilute projectile are used as a probe to resolve the small x partonic content of the dense target. Such dilute-dense processes can be described in the factorization framework of Improved Transverse Momentum Distributions (ITMDs). We present a new model for ITMDs where we explicitly introduce the impact parameter (b) dependence in the ITMDs, to properly account for the nuclear enhancement of gluon saturation effects, and discuss the phenomenological consequences for p - Pb, p - Xe and p - O collisions at the LHC. While the case of p - p and e - p collisions is used to fix the model parameters, we find that, on average, the nuclear enhancement of the saturation scale is noticeably weaker than expected from naive scaling with a simple dependence on the atomic number. Since our model explicitly accounts for event-by-event fluctuations of the nuclear geometry, it can also be applied to study forward central correlations in p - A collisions
Comparison of differential elastic cross sections in and collisions as evidence of the existence of the colourless -odd three-gluon state
No full textWe analyze the differences between the and differentia l elastic cross section measurements by the D0 and TOTEM Collaborations at the Tevatron, Fermilab, and the LHC, CERN that lead to a significance larger than 3 of the existence of the colourless -odd three-gluon state, the odderon.We analyze the differences between the and differential elastic cross section measurements by theD0 and TOTEM Collaborations at the Tevatron, Fermilab, and the LHC, CERN that lead to a significance larger than 3 of the existence of thecolourless -odd three-gluon state, the odderon
Comparison of and differential elastic cross sections and observation of the exchange of a colorless -odd gluonic compound
No full textWe describe the discovery of the colorless -odd gluonic compound, the odderon, by the D0 and TOTEM Collaborations by comparing elastic differential cross sections measured in and interactions at high energies
Hugues de Hautelocque, v.1880
No full textPortrait de Hugues de Hauteclocque (Lille, 1870-Royon, 1939). Photographie C. Mouth (68 boulevard de la Liberté, Lille), v.1880. Archives de Laprée, Quiestède, 5.P0103.79. Article révisé le 23/12/2019
Physics with intact protons at the LHC: from the odderon discovery to the sensitivity to beyond standard model physics
No full textWe describe the discovery of the colorless -odd gluonic compound, the
odderon, by the D0 and TOTEM Collaborations by comparing elastic differential
cross sections measured in and interactions at high energies.
We also discuss the reach on quartic anomalous couplings and the sensitivity to
axion like particle production by using the LHC as a collider
and detecting the intact protons at high luminosity.Comment: This article corresponds to the talk given at the 18th Workshop of
Particles and Fields, Puebla, Mexico, November 21-25 2022 after receiving the
2022 medal of the Mexican Society of Physics, Division of Particles and
Field
Exclusive diffractive Higgs production at the LHC
No full text5 pages, proceedings of the DIS 2004 conferenceWe use a Monte Carlo implementation of recently developped models of double diffractive Higgs production to assess the sensitivity of the LHC experiments
Diffractive Higgs boson production at Tevatron and LHC: an experimental review
No full textWe discuss the different models of central diffractive production of the Higgs boson at the Tevatron and the LHC. We also describe how the models can be tested using diffractive production data being taken at the Tevatron. We finally discuss the advantages of using diffractive events to reconstruct the mass of the Higgs boson especially at the LHC
Test of Ultra Fast Silicon Detectors for Picosecond Time Measurements with a New Multipurpose Read-Out Board
No full textUltra Fast Silicon Detectors (UFSD) are sensors optimized for timing measurements employing a thin multiplication layer to increase the output signal. A multipurpose read-out board hosting a low-cost, low-power fast amplifier was designed at the University of Kansas and tested at the European Organization for Nuclear Research (CERN) using a 180 GeV pion beam. The amplifier has been designed to read out a wide range of detectors and it was optimized in this test for the UFSD output signal. In this paper we report the results of the experimental tests using 50 thick UFSD with a sensitive area of 1.4 . A timing precision below 30 ps was achieved.Ultra Fast Silicon Detectors (UFSD) are sensors optimized for timing measurements employing a thin multiplication layer to increase the output signal. A multipurpose read-out board hosting a low-cost, low-power fast amplifier was designed at the University of Kansas and tested at the European Organization for Nuclear Research (CERN) using a 180 GeV pion beam. The amplifier has been designed to read out a wide range of detectors and it was optimized in this test for the UFSD output signal. In this paper we report the results of the experimental tests using 50 µm thick UFSD with a sensitive area of 1.4mm2 . A timing precision below 30 ps was achieved
Description of the ATLAS jet veto measurement and jet gap jet events at hadronic colliders
No full textWe present a new QCD description of the ATLAS jet veto measurement, using the Banfi- Marchesini-Smye equation to constrain the inter-jet QCD radiation. This equation resums emis- sions of soft gluons at large angles and leads to a very good description of data. We also investigate jet gap jet events in hadron-hadron collisions, in which two jets are produced and separated by a large rapidity gap. Using a renormalisation-group improved NLL kernel implemented in the HERWIG Monte Carlo program, we show that the BFKL predictions are in good agreement with the Tevatron data, and present predictions that could be tested at the LHC
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