Measurement of the $Υ$(1S) pair production cross section and search for resonances decaying to $Υ$(1S)$μ^+μ^-$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV

doi:10.48550/arxiv.2002.06393

Cited by 11 publications

(25 citation statements)

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“…Therefore these states should be broad and difficult to be observed in experimental studies. This conclusion about 1S bb bb tetraquarks agree with current experimental data of LHCb [39] and CMS [89] Collaborations. No narrow beautiful tetraquarks in the Υ(1S)-pair production were observed in these experiments.…”

Section: B Tetraquarkssupporting

confidence: 91%

Nonrelativistic Treatment of Fully-Heavy Tetraquarks as Diquark-Antidiquark States

Mutuk

2021

Preprint

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The goal of the present work is to obtain a reliable estimate of the masses of the ground and radially excited states of fully-heavy tetraquark systems. In order to do this, we use a nonrelativistic model of tetraquarks which are assumed to be compact and consist of diquark-antidiquark pairs. This nonrelativistic model is composed of Hulthen potential, a linear confining potential and spin-spin interaction. We computed ground, first, and second radially excited cccc and bb bb tetraquark masses. It was found that predicted masses of ground states of cccc and bb bb tetraquarks are significantly higher than the thresholds of the fall-apart decays to the lowest allowed two-meson states. These states should be broad and are thus difficult to observe experimentally. First radially excited states are considerably lower than their corresponding (2S-2S) two-meson thresholds. We hope that our study may be helpful to the experimental search for ground and excited cccc and bb bb tetraquark states.

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Section: B Tetraquarkssupporting

confidence: 91%

Nonrelativistic Treatment of Fully-Heavy Tetraquarks as Diquark-Antidiquark States

Mutuk

2021

Preprint

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“…We observe that σ(pp → 2Υ) 69(79) pb is the two-Υ production cross section measured by CMS at 8 TeV [27] (13 TeV [28]).…”

Section: The Value Of |ψ T (0)|mentioning

confidence: 99%

Search for $bb\bar{b}\bar{b}$ tetraquark decays in 4 muons, $B^{+} B^{-}$, $B^0 \bar{B}^0$ and $B_s^0 \bar{B}_s^0$ channels at LHC

Becchi,

Giachino,

Maiani

et al. 2020

Preprint

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We perform a quantitative analysis of the bb bb tetraquark decays into hidden-and open-bottom mesons and calculate, for the first time, the bb bb tetraquark total decay width. On the basis of our results, we propose the bb bbs ) → l + l − + X decays as the most suitable channels to observe the bb bb tetraquark states, since the calculated two-lepton cross section upper limit, 39 fb, is so large as to be potentially detectable with the 2018 LHCb sensitivity, paving the way to the observation of the bb bb tetraquark in the future LHCb upgrade. The 4µ signal for the ground state, J P C = 0 ++ , is likely to be too small even for the upgraded LHCb, but it may not be hopeless for the J P C = 2 ++ fully-bottom state.

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“…Besides the above LHCb experiment [1], in 2017 the CMS Collaboration had reported their measurement of an exotic structure in four lepton channel, and found an excess in 18.4±0.1±0.2 GeV with a global significance of 3.6σ [11,12]. This structure is a possible fully-bottom tetraquark state, but it was not confirmed in the latter LHCb and CMS experiments [13,14]. Driven by the above CMS and LHCb experiments [1,[11][12][13][14], intensive theoretical studies have been performed to investigate fully-heavy tetraquark states [2,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], while the conclusions are quite model dependent.…”

Section: Introductionmentioning

confidence: 99%

“…This structure is a possible fully-bottom tetraquark state, but it was not confirmed in the latter LHCb and CMS experiments [13,14]. Driven by the above CMS and LHCb experiments [1,[11][12][13][14], intensive theoretical studies have been performed to investigate fully-heavy tetraquark states [2,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], while the conclusions are quite model dependent. For examples, the bb bb tetraquark states are possible to lie below the di-bottomonium threshold according to Refs.…”

Section: Introductionmentioning

confidence: 99%

Strong decays of fully-charm tetraquarks into di-charmonia

Chen,

Liu

et al. 2020

Preprint

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We study strong decays of the possible fully-charm tetraquarks recently observed by LHCb [1], and calculate their relative branching ratios through the Fierz rearrangement. Together with our previous QCD sum rule study [2], our results suggest that the broad structure around 6.2-6.8 GeV can be interpreted as an S-wave cccc tetraquark state with J P C = 0 ++ or 2 ++ , and the narrow structure around 6.9 GeV can be interpreted as a P -wave one with J P C = 0 −+ or 1 −+ . These structures were observed in the di-J/ψ invariant mass spectrum, and we propose to confirm them in the di-ηc, J/ψhc, ηcχc0, and ηcχc1 channels. We also propose to search for their partner states having the negative charge-conjugation parity in the J/ψηc, J/ψχc0, J/ψχc1, and ηchc channels.

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Measurement of the $Υ$(1S) pair production cross section and search for resonances decaying to $Υ$(1S)$μ^+μ^-$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV

Cited by 11 publications

References 0 publications

Nonrelativistic Treatment of Fully-Heavy Tetraquarks as Diquark-Antidiquark States

Nonrelativistic Treatment of Fully-Heavy Tetraquarks as Diquark-Antidiquark States

Search for $bb\bar{b}\bar{b}$ tetraquark decays in 4 muons, $B^{+} B^{-}$, $B^0 \bar{B}^0$ and $B_s^0 \bar{B}_s^0$ channels at LHC

Strong decays of fully-charm tetraquarks into di-charmonia

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