arXiv subjects

A. C. Canbay

Publications and source records attributed to A. C. Canbay.

8 recordsLinked to original sources

arXiv2026

A Linear Collider Vision for the Future of Particle Physics

In this paper we review the physics opportunities at linear $e^+e^-$ colliders with a special focus on high centre-of-mass energies and beam polarisation, take a fresh look at the various accelerator technologies available or under development and, for the first time, discuss how a facility first equipped with a technology mature today could be upgraded with technologies of tomorrow to reach much higher energies and/or luminosities. In addition, we will discuss detectors and alternative collider modes, as well as opportunities for beyond-collider experiments and R\&D facilities as part of a linear collider facility (LCF). The material of this paper will support all plans for $e^+e^-$ linear colliders and additional opportunities they offer, independently of technology choice or proposed site, as well as R\&D for advanced accelerator technologies. This joint perspective on the physics goals, early technologies and upgrade strategies has been developed by the LCVision team based on an initial discussion at LCWS2024 in Tokyo and a follow-up at the LCVision Community Event at CERN in January 2025. It heavily builds on decades of achievements of the global linear collider community, in particular in the context of CLIC and ILC.

hep-ex↗

arXiv2026

Probing Nucleon Spin Structure with a Polarized Gamma Beam from Compton Backscattering at FCC-ee

We present the design of a high-energy polarized gamma-ray facility based on Compton backscattering (CBS) of laser pulses off the FCC-ee full-energy booster beams in the Z, WW, ZH and $t\bar{t}$ modes. Saturating the safe value of the kinematic parameter $κ=4.35$ fixes the laser wavelength in each mode and yields backscattered photons up to $ω_{\max}=148$ GeV. The conversion point operates on the booster cycle structure: fully parasitically on the 0.1 s top-up flat-tops ($f_{\rm CBS}=10^{-8}$ per bunch crossing, cumulative electron loss $3\times10^{-6}$ per cycle) or, as the baseline, in dedicated extended-flat-top fills inside the idle windows between top-up cycles ($f_{\rm CBS}=10^{-6}$, beam loss below 1% per cycle). The collider luminosity is unaffected in both scenarios, and the operational laser pulse energies lie in the sub-millijoule to few-millijoule range. Photon selection is performed event-by-event with a pair spectrometer on the high-energy Compton edge; for the unpolarized booster beam the Compton polarization transfer limits the achievable band-averaged circular polarization, and the selection is set to $|\langle S_2\rangle|=0.90$. We project the sensitivity to the polarized gluon distribution $Δg(x)$ via open-charm photoproduction $γp\to c\bar{c}X$ on an NH$_3$ dynamically polarized target, including NLO QCD corrections via K-factors and propagating polarized-PDF uncertainties through the 100 Monte Carlo replicas of NNPDFpol2.0. The projected total precision is $δ(Δg/g)_{\rm tot}\simeq 1.8$-$3.0\times10^{-2}$, a factor of 4-7 below the total uncertainty of the most precise existing direct measurement (HERMES), at four values of $\langle x\rangle$ in the medium-$x$ region $0.07\le x\le 0.19$. The facility would set the dominant constraint on $Δg$ in this region, complementary to the low-$x$ reach of the Electron-Ion Collider.

hep-ex↗

arXiv2026

$μ$LHC: Antimuon Ring and HL-LHC based $μ^+p$ Collider

Conceptual design and performance evaluation of HL-LHC based antimuon-proton collider ($μ$LHC) are presented. Leveraging the $μ$TRISTAN concept based on established J-PARC ultra-cold $μ^{+}$ beam technology, $μ$LHC will give the opportunity to achieve a 5.3 TeV center-of-mass energy, significantly surpassing EIC and LHeC. Two booster ring options for $μ^{+}$ acceleration, namely, a $μ$TRISTAN-based and a repurposed LHeC ERL-based systems, are explored. Achievable luminosities are predicted to exceed $10^{33} cm^{-2}s^{-1}$. The $μ$LHC offers substantially wider kinematic plane coverage, particularly in small-x and high-$Q^{2}$ regions, significantly contributing to QCD basics and Higgs boson properties. Its unique potential for BSM physics extends to muon-related phenomena like excited muons, color-octet muons, leptoquarks, and contact interactions. A possible detector concept is also outlined. Given the maturity of ultra-cold $μ^{+}$ beam technology, $μ$LHC is highly feasible for earlier realization than the muon collider, positioning it as a critical tool for the future of high energy physics.

physics.acc-ph↗

arXiv2025

ECFA Higgs, electroweak, and top Factory Study

The ECFA Higgs, electroweak, and top Factory Study ran between 2021 and 2025 as a broad effort across the experimental and theoretical particle physics communities, bringing together participants from many different proposed future collider projects. Activities across three main working groups advanced the joint development of tools and analysis techniques, fostered new considerations of detector design and optimisation, and led to a new set of studies resulting in improved projected sensitivities across a wide physics programme. This report demonstrates the significant expansion in the state-of-the-art understanding of the physics potential of future e+e- Higgs, electroweak, and top factories, and has been submitted as input to the 2025 European Strategy for Particle Physics Update.

hep-ex↗

arXiv2025

The Linear Collider Facility (LCF) at CERN

In this paper we outline a proposal for a Linear Collider Facility as the next flagship project for CERN. It offers the opportunity for a timely, cost-effective and staged construction of a new collider that will be able to comprehensively map the Higgs boson's properties, including the Higgs field potential, thanks to a large span in centre-of-mass energies and polarised beams. A comprehensive programme to study the Higgs boson and its closest relatives with high precision requires data at centre-of-mass energies from the Z pole to at least 1 TeV. It should include measurements of the Higgs boson in both major production mechanisms, ee -> ZH and ee -> vvH, precision measurements of gauge boson interactions as well as of the W boson, Higgs boson and top-quark masses, measurement of the top-quark Yukawa coupling through ee ->ttH, measurement of the Higgs boson self-coupling through HH production, and precision measurements of the electroweak couplings of the top quark. In addition, ee collisions offer discovery potential for new particles complementary to HL-LHC.

hep-ex↗

arXiv2025

A Safer, Smaller, Cleaner Subcritical Thorium Fission - Deuteron Fusion Hybrid Reactor: DD Collider Instead of Muonic Fusion

Fossil fuels, which meet most of humanity's energy needs, cause climate change due to their high carbon emissions. There are two types of energy sources that can replace fossil fuels: renewable and nuclear. Nuclear energy sources are more advantageous in terms of efficiency and sustainability. The use of Thorium as nuclear fuel in fusion reactors will contribute to the reduction of radioactive waste, due to the much lower production of transuranics. Fusion reactors, which are considered promising, are still in the R&D phase. In this respect, hybrid fusion-fission reactors seem more promising and the recently proposed combination of muon-catalyzed DD fusion with a cascade thorium reactor is worthy of appreciation. In this study, we show that using the DD collider instead of muonic fusion has significant advantages.

physics.acc-ph↗

arXiv2023

Investigating the Single Production of Vector-Like Quarks Decaying into Top Quark and W Boson through Hadronic Channels at the HL-LHC

We investigate the single production of vector-like quarks at the High Luminosity LHC (HL-LHC). With the assumed (enhanced) couplings to third generation quarks of the standard model, vector-like quarks $B/X$ are produced in association with a bottom ($b$) or top ($t$) quark, which correspond to $Bbq$ and $Btq/Xtq$ production modes, including an additional soft forward jet from the spectator quark ($q$). This study focuses on high-mass vector-like quarks $B/X$ decaying into a top quark and a $W$ boson, resulting in the final state jets emerging from hadronically decaying top quark ($t\to Wb$) and $W$ boson ($W\to q\bar{q}'$). The events with $W$ boson and $t$ quark have been analysed using tagging techniques for large-radius jets. The scan ranges of the mass ($1000<m_{B/X}<3000$ GeV) for the relative width $Γ_{B/X}/m_{B/X}=0.1$ and $Γ_{B/X}/m_{B/X}=0.01$ of vector-like $B/X$ quarks have been investigated. From the results of the analysis, the masses of vector like quarks $B$($X$) up to $2491$ ($2364$) GeV and $2018$ ($1873$) GeV can be excluded corresponding to these relative width cases at $95\%$ CL depending on the type and branching scenarios at integrated luminosity projection of $3$ ab$^{-1}$ at the HL-LHC.

hep-ph↗

arXiv2017

SppC based energy frontier lepton-proton colliders: luminosity and physics

In this study, main parameters of Super proton-proton Collider (SppC) based lepton-proton colliders are estimated. For electron beam parameters, highest energy International Linear Collider (ILC) and Plasma Wake Field Accelerator-Linear Collider (PWFA-LC) options are taken into account. For muon beams, 1.5 TeV and 3 TeV center of mass energy Muon Collider parameters are used. In addition, ultimate $μ$p collider which assumes construction of additional 50 TeV muon ring in the SppC tunnel is considered as well. It is shown that $L_{ep}$ $\sim$ $10^{32}$ $cm^{-2}s^{-1}$ can be achieved with moderate upgrade of the SppC proton beam parameters. Physics search potential of proposed lepton-proton colliders is illustrated by considering small Bjorken x region as an example of SM physics and resonant production of color octet leptons as an example of BSM physics.

physics.acc-ph↗