Prospects for new physics observations in diffractive processes at the LHC and Tevatron

Хозе, В. А.; Martin, A. D.; Ryskin, M.G.

doi:10.1007/s100520100884

Cited by 316 publications

(588 citation statements)

References 35 publications

Supporting

Mentioning

570

Contrasting

Order By: Relevance

“…The experimental situation at the LHC is very encouraging here, and such processes may be measured with both protons tagged using the approved and installed AFP [16,17] and CT-PPS [18] forward proton spectrometers, associated with the ATLAS and CMS central detectors, respectively, see also [19]. Moreover, the measurement of new heavy objects with tagged protons can in general be highly advantageous, see [20][21][22][23][24][25][26]. We therefore present a precise evaluation of the exclusive γγ luminosity, accounting for all physical effects, including the probability of no additional underlying event activity, or so-called survival factor.…”

Section: Jhep03(2016)182mentioning

confidence: 99%

The production of a diphoton resonance via photon-photon fusion

Harland–Lang

Khoze

Ryskin

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

Motivated by the recent LHC observation of an excess of diphoton events around an invariant mass of 750 GeV, we discuss the possibility that this is due to the decay of a new scalar or pseudoscalar resonance dominantly produced via photon-photon fusion. We present a precise calculation of the corresponding photon-photon luminosity in the inclusive and exclusive scenarios, and demonstrate that the theoretical uncertainties associated with these are small. In the inclusive channel, we show how simple cuts on the final state may help to isolate the photon-photon induced cross section from any gluongluon or vector boson fusion induced contribution. In the exclusive case, that is where both protons remain intact after the collision, we present a precise cross section evaluation and show how this mode is sensitive to the parity of the object, as well as potential CP -violating effects. We also comment on the case of heavy-ion collisions and consider the production of new heavy colourless fermions, which may couple to such a resonance.

show abstract

Section: Jhep03(2016)182mentioning

confidence: 99%

The production of a diphoton resonance via photon-photon fusion

Harland–Lang

Khoze

Ryskin

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…We note that m a < 2m τ generally leads to G > 50, for all values of tan β, and thus the four-tau decay channel is always most natural. The second part of the production cross-section is the gluon luminosity function and it falls by a factor ∼ 2 in going from m h = 90 GeV to m h = 110 GeV [14]. Including the explicit 1/m 3 h dependence of (1.1), the production cross-section therefore falls by a factor ∼ 3 as m h increases from 90 GeV to 110 GeV at fixed Γ eff .…”

Section: Jhep04(2008)090mentioning

confidence: 98%

“…ExHuME faithfully implements the theoretical approach to CEP detailed in [14,18]. 6 The a → τ + τ − decays are enforced using the PYTHIA event generator [26] and PYTHIA is also used for the subsequent τ decays.…”

Section: Simulating the Signal And Backgroundsmentioning

confidence: 99%

Reinstating the `no-lose' theorem for NMSSM Higgs discovery at the LHC

Forshaw¹,

Gunion²,

Hodgkinson³

et al. 2008

J. High Energy Phys.

View full text Add to dashboard Cite

The simplest supersymmetric model that solves the µ problem and in which the GUT-scale parameters need not be finely tuned in order to predict the correct value of the Z boson mass at low scales is the Next-to-Minimal Supersymmetric Standard Model (NMSSM). However, in order that fine tuning be absent, the lightest CP-even Higgs boson h should have mass ∼ 100 GeV and SM couplings to gauge bosons and fermions. The only way that this can be consistent with LEP limits is if h decays primarily via h → aa → τ + τ − τ + τ − or 4j but not 4b, where a is the lighter of the two pseudo-scalar Higgses that are present in the NMSSM. Interestingly, m a < 2m b is natural in the NMSSM with m a > 2m τ somewhat preferred. Thus, h → τ + τ − τ + τ − becomes a key mode of interest. Meanwhile, all other Higgs bosons of the NMSSM are typically quite heavy. Detection of any of the NMSSM Higgs bosons at the LHC in this preferred scenario will be very challenging using conventional channels. In this paper, we demonstrate that the h → aa → τ + τ − τ + τ − decay chain should be visible if the Higgs is produced in the process pp → p + h + p with the final state protons being measured using suitably installed forward detectors. Moreover, we show that the mass of both the h and the a can be determined on an event-by-event basis.

show abstract

“…The first diagram (figure 2, left) corresponds to exclusive QCD di-photon production via gluon exchanges [23] (the second gluon ensures that the exchange is colorless leading to intact protons in the final state) and the second one (figure 2, right) via photon exchanges.…”

Section: Jhep02(2015)165mentioning

confidence: 99%

“…The parton distributions in the Pomeron as determined by the H1 collaboration at HERA (see [41] an references therein) are used with a survival probability of 0.03 [23,24]. The list of particles is corrected at the end of each event to change the type of particles from the initial state electrons to hadrons and from the exchanged photons to pomerons/reggeons, or gluons, depending on the process.…”

Section: Event Generation With the Forward Physics Monte Carlo Generatormentioning

confidence: 99%

Light-by-light scattering with intact protons at the LHC: from standard model to new physics

Fichet

Gersdorff

Lenzi

et al. 2015

J. High Energ. Phys.

121

View full text Add to dashboard Cite

Abstract:We discuss the discovery potential of light-by-light scattering at the Large Hadron Collider (LHC), induced by the Standard Model (SM) and by new exotic charged particles. Our simulation relies on intact proton detection in the planned forward detectors of CMS and ATLAS. The full four-photon amplitudes generated by any electrically charged particles of spins 1/2 and 1, including the SM processes involving loops of leptons, quarks and W bosons are implemented in the Forward Physics Monte Carlo generator. Our method provides model-independent bounds on massive charged particles, only parametrized by the spin, mass and "effective charge" Q eff of the new particle. We find that a new charged vector (fermion) with Q eff = 4 can be discovered up to m = 700 GeV (m = 370 GeV) with an integrated luminosity of 300 fb −1 at the LHC. We also discuss the sensitivities to neutral particles such as a strongly-interacting heavy dilaton and warped Kaluza-Klein gravitons, whose effects could be discovered for masses in the multi-TeV range.

show abstract

Prospects for new physics observations in diffractive processes at the LHC and Tevatron

Cited by 316 publications

References 35 publications

The production of a diphoton resonance via photon-photon fusion

The production of a diphoton resonance via photon-photon fusion

Reinstating the `no-lose' theorem for NMSSM Higgs discovery at the LHC

Light-by-light scattering with intact protons at the LHC: from standard model to new physics

Contact Info

Product

Resources

About