Challenging exclusive top quark pair production at low and high luminosity LHC

Martins, Daniel E.; Tasevsky, Marek; Goncalves, Victor P.

doi:10.48550/arxiv.2202.01257

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…The upcoming Run3 of the LHC may provide an unique opportunity to collect enough luminosity for such measurement, opening new fronts for the investigation of photon interactions and improvement of the computational tools available in the literature (see e.g. Dark Matter searches [436] or t t production [459,460], both in the exclusive mode).…”

Section: B Non-elastic Contribution In Photon-photon Physicsmentioning

confidence: 99%

White Paper on Forward Physics, BFKL, Saturation Physics and Diffraction

Hentschinski¹,

Royon²,

Peredo³

et al. 2022

Preprint

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The goal of this white paper is to give a comprehensive overview of the rich field of forward physics. We discuss the occurrences of BFKL resummation effects in special final states, such as Mueller-Navelet jets, jet gap jets, and heavy quarkonium production.It further addresses TMD factorization at low x and the manifestation of a semi-hard saturation scale in (generalized) TMD PDFs. More theoretical aspects of low x physics, probes of the quark gluon plasma, as well as the possibility to use photon-hadron collisions at the LHC to constrain hadronic structure at low x, and the resulting complementarity between LHC and the EIC are also presented. We also briefly discuss diffraction at colliders as well as the possibility to explore further the electroweak theory in central exclusive events using the LHC as a photon-photon collider. CONTENTS I. Introduction II. Manifestations of BFKL evolution A. Mueller-Navelet jets B. Toward precision studies of BFKL dynamics C. Unintegrated gluon distribution (UGD) D. BFKL resummation of NLO collinear factorization: Heavy quarkonium production E. Diffraction: Gaps between jets III. Hadronic Structure at low x and gluon saturation A. Color Glass Condensate and high gluon densities B. Transverse Momentum Dependent Parton Distribution Functions C. Complementarity between EIC and LHC D. Forward dijets: from LHC to EIC E. Color Glass Condensate beyond high energy factorization IV. Imprints of high gluon densities at low x at the LHC. A. Open QCD questions at a hadron-hadron collider: Parton fragmentation, mini-jets and their interplay with high parton densities B. Forward direct photon measurements 27 C. Top quark pair production as a tool to probe Quark-Gluon -Plasma formation 29 V. Ultra-peripheral collisions at hadronic colliders and exclusive reactions at the EIC 31 A. Existing measurements on diffractive vector meson photoproduction in UPCs 31 B. Future measurements on diffractive vector meson photoproduction in UPCs 33 C. The ratio of Ψ(2s) and J/Ψ photoproduction cross-sections as a tool to quantify non-linear QCD evolution 34 D. Planned measurements at the Electron Ion Collider 36 VI. Odderon discovery and diffractive jets 38 A. Soft diffraction and the Odderon discovery by the D0 and TOTEM experiments 38 B. Inclusive diffraction measurements at the LHC and sensitivity to the Pomeron structure 39 VII. Electroweak and Beyond the Standard Model Physics 41 A. Precision Proton Spectrometer (PPS) and ATLAS Forward Proton detector (AFP) at high luminosity 41 B. Non-elastic contribution in photon-photon physics 44 C. Exclusive production of Higgs boson 47 D. Anomalous quartic couplings with proton tagging 49 VIII. Conclusions 53 Acknowledgements 54 References 55

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Section: B Non-elastic Contribution In Photon-photon Physicsmentioning

confidence: 99%

White Paper on Forward Physics, BFKL, Saturation Physics and Diffraction

Hentschinski¹,

Royon²,

Peredo³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…This means that the invariant mass of the t t system reconstructed with the intact protons information heavily underestimates the true t t mass (see for example the diffractive mass fraction reported by CDF in [57] or Figure 3 of Ref. [28]). This process is therefore suppressed in the selection process.…”

Section: Background Modelingmentioning

confidence: 99%

“…The SM central exclusive production of t t has been investigated in recent phenomenological studies [26][27][28]. The process has not been observed experimentally, but a recent search by the CMS Collaboration has set an upper bound on its cross section of σ = 0.59 pb at 95% CL at 13 TeV [29].…”

Section: Introductionmentioning

confidence: 99%

Searching for anomalous top quark interactions with proton tagging and timing detectors at the LHC

Baldenegro,

Bellora,

Fichet

et al. 2022

Preprint

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We study the LHC sensitivity to new broad neutral resonances produced in two-photon fusion and decaying to a top quark pair, γγ → t t. This is probed in central exclusive t t production in proton-proton collisions, pp → pt tp. We use the tagging of the intact protons by PPS (CMS) and AFP (ATLAS) and consider the semi-leptonic t t channel. The sensitivity is also mapped onto a set of dimension-8 γγt t operators in the large mass limit. Using the kinematical correlations between the intact protons and the reconstructed t t system, we obtain a sensitivity to the couplings of the dimension-8 operators of 1.4 • 10 −11 GeV −4 at 95% CL. The sensitivity to the anomalous couplings is significantly improved down to about 7 • 10 −12 GeV −4 if the proton time-of-flight is known with a precision of 20 ps in future measurements. The 95% CL sensitivity to broad neutral resonances reaches masses of order 1500 GeV when using timing information.

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Challenging exclusive top quark pair production at low and high luminosity LHC

Cited by 2 publications

References 24 publications

White Paper on Forward Physics, BFKL, Saturation Physics and Diffraction

White Paper on Forward Physics, BFKL, Saturation Physics and Diffraction

Searching for anomalous top quark interactions with proton tagging and timing detectors at the LHC

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