A measurement of two-jet decays of theW andZ bosons at the CERN $$\bar p$$ p collider

Alitti, J.; Ansari, R.; Ansorge, R. E.; Autiero, D.; Bareyre, P.; Blaylock, G.; Bonamy, P.; Bonesini, M.; Borer, K.; Bourliaud, M.; Buskulic, D.; Carboni, G.; Cavalli, D.; Cavasinni, V.; Cenci, P.; Chollet, J.C.; Conta, C.; Costa, G.; Costantini, F.; Cravero, A.; Dell’Acqua, A.; DelPrete, T.; DeWolf, R. S.; DiLella, L.; Egan, Gary F.; Einsweiler, K.; Fayard, L.; Federspiel, Andrea; Ferrari, R.; Fraternali, M.; Froidevaux, D.; Fumagalli, G.; Gaillard, J. M.; Gianotti, F.; Gildemeister, O.; Gößling, C.; Goggi, V. G.; Grünendahl, S.; Hara, K.; Hellman, S.; Hugentobler, E.; Hultqvist, K.; Iacopini, E.; Incandela, J.; Jakobs, K.; Jenni, P.; Kluge, E.-E.; Kurz, N.; Lami, S.; Lariccia, P.; Lefebvre, M.; Linssen, L.; Livan, M.; Lubrano, P.; Magneville, C.; Mandelli, L.; Mapelli, L.; Mazzanti, M.; Meier, K.; Merkel, B.; Meyer, J.; Moniez, M.; Moning, R.; Morganti, M.; Müller, L.; Munday, D. J.; Onions, C.; Pal, T.; Parker, M. A.; Parrour, G.; Pastore, F.; Pennacchio, E.; Pentney, J.M.; Pepé, M.; Perini, L.; Petridou, C.; Pétroff, P.; Plothow‐Besch, H.; Polesello, G.; Poppleton, A.; Pretzl, K.; Primavera, M.; Punturo, M.; Rasmussen, L.; Repellin, J. P.; Rimoldi, A.; Scampoli, P.; Schacher, J.; Šimák, V.; Singh, Sardar; Stapnes, S.; Stirling, A.; Tondini, F.; Tovey, S. N.; Tsesmelis, E.; Unal, G.; Valdata‐Nappi, M.; Vercesi, V.; Weidberg, A. R.; Wells, P. S.; White, T. O.; Wood, D.; Wotton, S. A.; Zaccone, H.

doi:10.1007/bf01570793

Cited by 76 publications

(22 citation statements)

References 20 publications

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“…The limits on g q are shown in Fig. 4 (left), along with limits from other experiments [2,8,9,18] and earlier CMS analyses [33,34,37]. The current results improve on the existing limits in the Z mass range 325 < m Z < 500 GeV, where g q values above 0.11-0.18 are excluded.…”

supporting

confidence: 74%

“…The mass of such a jet, determined using the so-called jet substructure techniques, can then be used to search for new light resonances. Searches of this kind, recently pioneered by CMS [36, 37], for the first time can reach resonance masses as low as 50 GeV, i.e., well below the lowest previously probed mass of 140 GeV, achieved by the UA2 analyses [2,3]. A similar analysis has been very recently carried out also by ATLAS [38].Yet another strategy of extending the reach to lower masses, pursued in this Letter, is to look for resonances decaying into jets originating from the fragmentation of b quarks.…”

mentioning

confidence: 97%

“…These results improve on the limits for resonances decaying into jet pairs in the 325-500 GeV mass range.Searches for new particles decaying to pairs of jets are pursued vigorously at hadron colliders, repeated at every new energy with ever increasing sensitivity in the quest for physics beyond the standard model (SM). Such "dijet" final states have been explored in proton-antiproton collisions by the UA1 [1] and UA2 [2,3] Collaborations at the CERN SppS, and at √ s = 1.8 and 1.96 TeV by the CDF [4-9] and D0 [10-12] Collaborations at the Fermilab Tevatron, as well as in proton-proton (pp) collisions at √ s = 7, 8, and 13 TeV by the ATLAS [13-22] and CMS [23-35] Collaborations at the CERN LHC.The LHC dijet searches currently explore both the high-mass end of the spectrum, not previously accessible at lower-energy machines, and the low-mass range, aiming to gain sensitivity to much smaller couplings than those probed by earlier experiments. The latter searches are much more difficult because of the very large backgrounds, which result in overwhelming event rates that are beyond the typical trigger bandwidth of the ATLAS and CMS experiments.…”

mentioning

confidence: 99%

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Search for Narrow Resonances in the b -Tagged Dijet Mass Spectrum in Proton-Proton Collisions at s=8 TeV

Sirunyan¹,

Tumasyan²,

Adam³

et al. 2018

Phys. Rev. Lett.

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A search for narrow resonances decaying to bottom quark-antiquark pairs is presented, using a data sample of proton-proton collisions at √ s = 8 TeV corresponding to an integrated luminosity of 19.7 fb −1 . The search is extended to masses lower than those reached in typical searches for resonances decaying into jet pairs at the LHC, by taking advantage of triggers that identify jets originating from bottom quarks. No significant excess of events is observed above the background predictions. Limits are set on the product of cross section and branching fraction to bottom quarks for spin 0, 1, and 2 resonances in the mass range of 325-1200 GeV. These results improve on the limits for resonances decaying into jet pairs in the 325-500 GeV mass range.

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supporting

confidence: 74%

mentioning

confidence: 97%

mentioning

confidence: 99%

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Search for Narrow Resonances in the b -Tagged Dijet Mass Spectrum in Proton-Proton Collisions at s=8 TeV

Sirunyan¹,

Tumasyan²,

Adam³

et al. 2018

Phys. Rev. Lett.

Self Cite

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“…They have excluded the mass range of 320-740 GeV, assuming SM couplings. (For limits on lighter Z 0 gauge bosons, see results from UA2 [25,26].) However, these limits can be easily evaded by making the couplings between the quarks and the Z 0 slightly smaller than those in the SM.…”

Section: Constraints On Flavored Dark Mattermentioning

confidence: 99%

Flavored dark matter in direct detection experiments and at the LHC

Kile

Soni

2011

Phys. Rev. D

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We consider the possibility that dark matter can communicate with the standard model fields via flavor interactions. We take the dark matter to belong to a ''dark sector'' which contains at least two types, or ''flavors,'' of particles and then hypothesize that the standard model fields and dark matter share a common interaction which depends on flavor. As, generically, interaction eigenstates and mass eigenstates need not coincide, we consider both flavor-changing and flavor-conserving interactions. These interactions are then constrained by meson decays, kaon mixing, and current collider bounds, and we examine their relevance for direct detection and the LHC.

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“…gg being seen above the dijet background at hadron colliders. Existing searches at the LHC [23,24] are only constraining for values of M A beyond our region of interest while those from the Tevatron [25,26] and at lower energies [27] are found to be rather weak.…”

Section: Collider Phenomenologymentioning

confidence: 96%

Higgs properties in the fourth-generation MSSM: Boosted signals over the three-generation plan

et al. 2011

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The generalization of the minimal supersymmetric standard model (MSSM) to the case of four chiral fermion generations (4GMSSM) can lead to significant changes in the phenomenology of the otherwise familiar Higgs sector. In most of the 3GMSSM parameter space, the lighter CP-even h is $115-125 GeV and mostly standard model-like while H, A, H AE are all relatively heavy. Furthermore, the ratio of Higgs vacuum expectation values, tan, is relatively unconstrained. In contrast to this, in the 4GMSSM, heavy fourth-generation fermion loops drive the masses of h, H, H AE to large values while the CP-odd boson, A, can remain relatively light and tan is restricted to the range 1=2 & tan & 2 due to perturbativity requirements on Yukawa couplings. We explore this scenario in some detail, concentrating on the collider signatures of the light CP-odd Higgs at both the Tevatron and LHC. We find that while gg ! A may lead to a potential signal in the þ À channel at the LHC, A might first be observed in the channel due to a highly loop-enhanced cross section that can be more than an order of magnitude greater than that of a SM Higgs for A masses of $100-150 GeV and tan < 1. We find that the CP-even states h, H are highly mixed and can have atypical branching fractions. Precision electroweak constraints, particularly for the light A parameter space region, are examined in detail.

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A measurement of two-jet decays of theW andZ bosons at the CERN $$\bar p$$ p collider

Cited by 76 publications

References 20 publications

Search for Narrow Resonances in the b -Tagged Dijet Mass Spectrum in Proton-Proton Collisions at s=8 TeV

Search for Narrow Resonances in the b -Tagged Dijet Mass Spectrum in Proton-Proton Collisions at s=8 TeV

Flavored dark matter in direct detection experiments and at the LHC

Higgs properties in the fourth-generation MSSM: Boosted signals over the three-generation plan

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