QCD corrections to stoponium production at hadron colliders

Younkin, James E.; Martin, Stephen P.

doi:10.1103/physrevd.81.055006

Cited by 27 publications

(55 citation statements)

References 56 publications

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“…These next-to-leading order QCD corrections to Γ(η t → γγ) significantly decrease [403] the rate while NLO corrections to the production cross section tend to increase it [404], leaving the product in Eq. (84) largely unchanged from the leading-order prediction.…”

Section: Supersymmetric Quarkoniamentioning

confidence: 99%

See 1 more Smart Citation

Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

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A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the B-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations at BESIII, the LHC, RHIC, FAIR, the Super Flavor and/or Tau-Charm factories, JLab, the ILC, and beyond. The list of newly-found conventional states expanded to include hc(1P ), χc2(2P ), B + c , and η b (1S). In addition, the unexpected and still-fascinating X(3872) has been joined by * Editors † Section coordinators ‡ Corresponding author: bkh2@cornell.edu more than a dozen other charmonium-and bottomonium-like "XY Z" states that appear to lie outside the quark model. Many of these still need experimental confirmation. The plethora of new states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of cc, bb, and bc bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. Lattice QCD has grown from a tool with computational possibilities to an industrialstrength effort now dependent more on insight and innovation than pure computational power. New effective field theories for the description of quarkonium in different regimes have been developed and brought to a high degree of sophistication, thus enabling precise and solid theoretical predictions. Many expected decays and transitions have either been measured with precision or for the first time, but the confusing patterns of decays, both above and below open-flavor thresholds, endure and have deepened. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hotand cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts.

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Section: Supersymmetric Quarkoniamentioning

confidence: 99%

“…These decay widths have recently been evaluated taking into account one-loop QCD corrections [403,404]. These next-to-leading order QCD corrections to Γ(η t → γγ) significantly decrease [403] the rate while NLO corrections to the production cross section tend to increase it [404], leaving the product in Eq.…”

Section: Supersymmetric Quarkoniamentioning

confidence: 99%

Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

View full text Add to dashboard Cite

show abstract

“…Furthermore, as discussed in ref. [53], it is likely that higher S-wave stoponium states contribute to the resonance signals, and we therefore include the first two states in our estimate. As we will argue below, we believe our assumptions in this regard are conservative, but we will also discuss in detail how different choices affect the stoponium production cross section and the resulting limits.…”

Section: Jhep07(2015)061mentioning

confidence: 99%

“…Our analysis relies on a number of previous works [41][42][43][44][45][46][47][48][49][50], notably those of Martin and collaborators [51][52][53][54]. Next we describe in more detail the basic requirements for observable stoponium annihilation decays.…”

Section: Jhep07(2015)061mentioning

confidence: 99%

Probing light stops with stoponium

Batell

Jung

2015

J. High Energ. Phys.

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We derive new limits on light stops from diboson resonance searches in the γγ, Zγ, ZZ, W W and hh channels from the first run of the LHC. If the two-body decays of the light stop are mildly suppressed or kinematically forbidden, stoponium bound states will form in pp collisions and subsequently decay via the pair annihilation of the constituent stops to diboson final states, yielding striking resonance signatures. Remarkably, we find that stoponium searches are highly complementary to direct collider searches and indirect probes of light stops such as Higgs coupling measurements. Using an empirical quarkonia potential model and including the first two S-wave stoponium states, we find that in the decoupling limit m t 1 130 GeV is excluded for any value of the stop mixing angle and heavy stop mass by the combination of the latest resonance searches and the indirect constraints. The γγ searches are the most complementary to the indirect constraints, probing the stop "blind spot" parameter region in which the h 0t 1t * 1 trilinear coupling is small. Interestingly, we also find that the Zγ searches give a stronger constraint, m t 1 170 GeV, if the stop is primarily left-handed. For a scenario with a bino LSP and stop NLSP, several gaps in the direct collider searches for stops can unambiguously be filled with the next run of the LHC. For a stop LSP decaying through an R-parity violating U DD coupling, the stoponium searches can fill the gap 100 GeV mt 1 200 GeV in the direct searches for couplings λ 10 −2 .

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“…[16] by incorporating important QCD corrections that arise in the calculation of pairs of strongly interacting heavy particles near threshold. Many of the same issues arise in the calculation of tt, squark-anti-squark, and gluino pair production [17][18][19][20][21]. There are two 1 Other representations are possible if NP transforms non-trivially under the SM flavor group [13].…”

Section: Introductionmentioning

confidence: 99%

Pair production of color-octet scalars at the LHC

2010

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Heavy colored scalar particles, which exist in many models of new physics, can be pair produced at the Large Hadron Collider (LHC) via gluon-gluon fusion and possibly form quarkonium-like bound states. If the scalars are also charged under the electroweak gauge group, these bound states can then decay into electroweak bosons. This yields a resonant cross section for final states such as γγ that can exceed Standard Model backgrounds. This paper studies this process in the Manohar-Wise model of color-octet scalars (COS). Important threshold logarithms and final state Coulomb-like QCD interactions are resummed using effective field theory. We compute the resummed cross section for gluon-gluon fusion to COS pairs at the LHC as well as the resonant cross section for octetonium decaying to γγ. The latter cross section exceeds the Standard Model di-photon cross section when the COS mass is less than 500 (350) GeV for √ s = 14 (7) TeV.Nonobservation of resonances below these energies can significantly improve existing bounds on

show abstract

QCD corrections to stoponium production at hadron colliders

Cited by 27 publications

References 56 publications

Heavy quarkonium: progress, puzzles, and opportunities

Heavy quarkonium: progress, puzzles, and opportunities

Probing light stops with stoponium

Pair production of color-octet scalars at the LHC

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