scholarly journals Exclusive Z0 photoproduction at the Large Hadron Collider and the Future Circular Collider

2020 ◽  
Vol 956 ◽  
pp. 115013
Author(s):  
R.O. Coelho ◽  
V.P. Gonçalves
Keyword(s):  
Large Hadron Collider ◽  
Hadron Collider ◽  
The Future

scholarly journals Dark Matter Searches at Colliders

2018 ◽  
Vol 68 (1) ◽  
pp. 429-459 ◽  
Author(s):  
Antonio Boveia ◽  
Caterina Doglioni
Keyword(s):  
Dark Matter ◽  
Large Hadron Collider ◽  
Particle Physics ◽  
Hadron Collider ◽  
The Future ◽  
Particle Dark Matter ◽  
Near Future

Colliders, among the most successful tools of particle physics, have revealed much about matter. This review describes how colliders contribute to the search for particle dark matter, focusing on the highest-energy collider currently in operation, the Large Hadron Collider (LHC) at CERN. In the absence of hints about the character of interactions between dark matter and standard matter, this review emphasizes what could be observed in the near future, presents the main experimental challenges, and discusses how collider searches fit into the broader field of dark matter searches. Finally, it highlights a few areas to watch for the future LHC program.

scholarly journals Echoes of 2HDM inflation at the collider experiments

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
Tanmoy Modak ◽  
Kin-ya Oda
Keyword(s):  
Large Hadron Collider ◽  
Linear Collider ◽  
Hadron Collider ◽  
International Linear Collider ◽  
Higgs Doublet ◽  
Lepton Colliders ◽  
The Future ◽  
Doublet Model ◽  
Near Degeneracy ◽  
Two Higgs Doublet Model

AbstractWe study the correlation between the constraints on general two Higgs doublet model from Higgs inflation and from collider experiments. The parameter space receives meaningful constraints from direct searches at the large hadron collider and from flavor physics if $$m_H$$ m H , $$m_A$$ m A , and $$m_{H^\pm }$$ m H ± are in the sub-TeV range, where H, A, and $$H^\pm $$ H ± are the CP even, CP odd, and charged Higgs bosons, respectively. We find that in the parameter region favored by the Higgs inflation, H, A, and $$H^\pm $$ H ± are nearly degenerate in mass. We show that such near degeneracy can be probed directly in the upcoming runs of the Large Hadron Collider, while the future lepton colliders such as the International Linear Collider and the future circular collider would provide complementary probes.

The quest for the Higgs boson at the LHC

2014 ◽  
Vol 29 (09) ◽  
pp. 1430019
Author(s):  
Tejinder S. Virdee
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Hadron Collider ◽  
Future Prospects ◽  
The Future ◽  
And Performance ◽  
The 1960S ◽  
Heavy Boson

In July 2012 the ATLAS and CMS experiments announced the discovery of a Higgs boson, confirming the conjecture put forward by Tom Kibble and others in the 1960s. This article will attempt to outline some of the challenges faced during the construction of the Large Hadron Collider and its experiments, their operation and performance, and selected physics results. In particular, results relating to the new heavy boson will be discussed as well as its properties and the future prospects for the LHC programme.

scholarly journals Higgs on the Moon

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Adam Falkowski
Keyword(s):  
Large Hadron Collider ◽  
Particle Physics ◽  
Hadron Collider ◽  
The Moon ◽  
Physics Learning ◽  
The Future ◽  
History Of ◽  
Experimental Particle ◽  
Manned Spaceflight

Adam Falkowski reviews recent results from the Large Hadron Collider and what they should mean for the future of experimental particle physics. Learning from the history of manned spaceflight, he argues, precision experiments, not larger colliders, hold more promise.

scholarly journals An Ultra-Low Temperature Transcritical R744 Refrigeration System for Future Detectors at CERN LHC

2021 ◽  
Vol 11 (16) ◽  
pp. 7399
Author(s):  
Pierre Barroca ◽  
Armin Hafner ◽  
Bart Verlaat ◽  
Paolo Petagna ◽  
Wojciech Hulek ◽  
...  
Keyword(s):  
Low Temperature ◽  
Large Hadron Collider ◽  
Hadron Collider ◽  
Refrigeration System ◽  
Two Stage ◽  
Cooling Systems ◽  
The Future ◽  
Technical Details

The cooling systems of the future tracking detectors of the ATLAS and CMS experiments at the Large Hadron Collider (LHC) at CERN will be entirely based on CO2 refrigeration technology. The system is a booster refrigeration system, composed of a two stage primary part with transcritical R744 equipment and a low temperature secondary CO2 pumped loop. The primary refrigeration sub-system installed on surface provides cold R744 at −53∘C to the CO2 pumped loops installed 100 m underground and rejects the heat exchanged. The process must be reliable and remain stable regardless of the amount of heat exchanged, which will amount to hundreds of kilowatts and is expected to vary throughout the lifetime of the detectors. The paper discusses the concept adopted for the innovative transcritical R744 cycle and describes the technical details of the first prototype built.

R&D FOR FUTURE DETECTORS

2005 ◽  
Vol 20 (22) ◽  
pp. 5276-5286
Author(s):  
JAMES E. BRAU
Keyword(s):  
Large Hadron Collider ◽  
Research And Development ◽  
Particle Physics ◽  
Linear Collider ◽  
Hadron Collider ◽  
International Linear Collider ◽  
Physics Program ◽  
The Future ◽  
Detector Technology

Research and development of detector technology are critical to the future particle physics program. The goals of the International Linear Collider, in particular, require advances that are challenging, despite the progress driven in recent years by the needs of the Large Hadron Collider. The ILC detector goals and challenges are described and the program to address them is summarized.

Summary and look to the future

1991 ◽  
Vol 336 (1642) ◽  
pp. 307-320 ◽  
Keyword(s):  
Large Hadron Collider ◽  
Standard Model ◽  
Hadron Collider ◽  
The Future ◽  
Under Construction

A brief review is given of (i) the initial performance and impact of LEP, and (ii) possible improvements in LEP’s capabilities and research which may be carried out in the future. Following an overview of the experimental and theoretical shortcomings of the so-called Standard Model, the potential of future colliders that are under construction or consideration is summarized. Emphasis is placed on the potential of the Large Hadron Collider that may be built at CERN in the LEP tunnel, which would be a natural successor to LEP.

scholarly journals CP mixed property of the Higgs-like particle in the decay channel h→Z Z*→4l

2014 ◽  
Vol 29 (15) ◽  
pp. 1450086 ◽  
Author(s):  
Yi Sun ◽  
Xian-Fu Wang ◽  
Dao-Neng Gao
Keyword(s):  
Large Hadron Collider ◽  
Decay Channel ◽  
Hadron Collider ◽  
The Future ◽  
The Difference ◽  
Mixed Property

Current experiments do not support, as ATLAS and CMS Collaborations at the Large Hadron Collider reported, that the Higgs-like resonance discovered in July 2012 is a pure CP-odd state. We examine a general hZZ vertex which contains CP-even and CP-odd couplings, by studying the process [Formula: see text] with l1, l2 = e or μ, to explore the CP mixed property of the Higgs-like particle. One momentum asymmetry and two angular asymmetries have been analyzed in order to reveal the difference from different CP-couplings. Our study shows that these asymmetries could be interesting observables in the future precise experiments.

scholarly journals Triggering long-lived particles in HL-LHC and the challenges in the first stage of the trigger system

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
Biplob Bhattacherjee ◽  
Swagata Mukherjee ◽  
Rhitaja Sengupta ◽  
Prabhat Solanki
Keyword(s):  
Large Hadron Collider ◽  
Hadron Collider ◽  
High Luminosity ◽  
Trigger System ◽  
Pile Up ◽  
The Future ◽  
Level 1

Abstract Triggering long-lived particles (LLPs) at the first stage of the trigger system is very crucial in LLP searches to ensure that we do not miss them at the very beginning. The future High Luminosity runs of the Large Hadron Collider will have increased number of pile-up events per bunch crossing. There will be major upgrades in hardware, firmware and software sides, like tracking at level-1 (L1). The L1 trigger menu will also be modified to cope with pile-up and maintain the sensitivity to physics processes. In our study we found that the usual level-1 triggers, mostly meant for triggering prompt particles, will not be very efficient for LLP searches in the 140 pile-up environment of HL-LHC, thus pointing to the need to include dedicated L1 triggers in the menu for LLPs. We consider the decay of the LLP into jets and develop dedicated jet triggers using the track information at L1 to select LLP events. We show in our work that these triggers give promising results in identifying LLP events with moderate trigger rates.

scholarly journals TEST OF EFFECT FROM FUTURE IN LARGE HADRON COLLIDER: A PROPOSAL

2009 ◽  
Vol 24 (20n21) ◽  
pp. 3945-3968 ◽  
Author(s):  
HOLGER B. NIELSEN ◽  
MASAO NINOMIYA
Keyword(s):  
Large Hadron Collider ◽  
Imaginary Part ◽  
Initial Conditions ◽  
Hadron Collider ◽  
Theoretical Models ◽  
High Luminosity ◽  
Clear Cut ◽  
The Past ◽  
Superconducting Super Collider ◽  
The Future

We have previously proposed the idea of performing a card-drawing experiment of which the outcome potentially decides whether the Large Hadron Collider (LHC) should be closed or not. The purpose is to test theoretical models such as our own model that have an action with an imaginary part that has a similar form to the real part. The imaginary part affects the initial conditions not only in the past but even from the future. It was speculated that all the accelerators producing large amounts of Higgs particles such as the Superconducting Super Collider (SSC) would mean that the initial conditions must have been arranged so as not to allow these accelerators to work. If such effects existed, we could perhaps cause a very clear-cut "miracle" by having the effect of a drawn card to be the closure of the LHC. Here we shall, however, argue that the closure of an accelerator is hardly needed to demonstrate such an effect and seek to calculate how one could perform a verification experiment for the proposed type of effect from the future in the statistically least disturbing and least harmful way. We shall also discuss how to extract the maximum amount of information about such as effect or model in the unlikely case that a card preventing the running of the LHC or the Tevatron is drawn, by estimating the relative importance of high beam energy or high luminosity for the purpose of our effect.

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