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# ATLAS Conference Notes

2021-04-06
13:54
 Search for heavy particles in the $b$-tagged di-jet mass distribution with additional $b$-tagged jets in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS experiment A search for new heavy particles decaying to two $b$-quarks is reported. [...] ATLAS-CONF-2021-019. - 2021. - 18 p. Original Communication (restricted to ATLAS) - Full text

2021-04-06
13:51
 Search for single vector-like $B$ quark production and decay via $B\rightarrow bH(b\bar{b})$ in pp collisions at $\sqrt{s} = 13\text{ TeV}$ with the ATLAS detector A search is presented for single production of a vector-like $B$ quark decaying to a Standard Model $b$-quark and the Standard Model Higgs boson, which decays into $b\bar{b}$. [...] ATLAS-CONF-2021-018. - 2021. - 36 p. Original Communication (restricted to ATLAS) - Full text

2021-03-31
19:26
 Search for lepton-flavor-violation in $Z$-boson decays with $\tau$-leptons with the ATLAS detector A search for lepton-flavor-violating $Z\to\tau e$ and $Z\to\tau \mu$ decays with $pp$ collision data from the ATLAS detector at the LHC is presented. [...] ATLAS-CONF-2021-017. - 2021. Original Communication (restricted to ATLAS) - Full text

2021-03-31
18:57
 Search for Higgs boson pair production in the two bottom quarks plus two photons final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector Searches are performed for non-resonant and resonant di-Higgs boson production in the $b\bar{b}\gamma\gamma$ final state. [...] ATLAS-CONF-2021-016. - 2021. Original Communication (restricted to ATLAS) - Full text

2021-03-31
18:10
 Search for long-lived charginos based on a disappearing-track signature using 136 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. [...] ATLAS-CONF-2021-015. - 2021. - 35 p. Original Communication (restricted to ATLAS) - Full text

2021-03-31
16:11
 Measurements of gluon fusion and vector-boson-fusion production of the Higgs boson in $H\rightarrow W W^* \rightarrow e\nu \mu\nu$ decays using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector The gluon fusion and vector-boson-fusion Higgs boson production modes are measured using proton--proton collisions in the $H\rightarrow W W^* \rightarrow e\nu \mu\nu$ decay channel. [...] ATLAS-CONF-2021-014. - 2021. Original Communication (restricted to ATLAS) - Full text

2021-03-31
15:40
 Measurement of the $t\bar{t}t\bar{t}$ production cross section in pp collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb$^{-1}$ is presented. [...] ATLAS-CONF-2021-013. - 2021. - 34 p. Original Communication (restricted to ATLAS) - Full text

2021-03-27
12:53
 Search for new phenomena in final states with two leptons and one or no $b$-tagged jets at $\sqrt{s} = 13$ TeV using the ATLAS detector A search for new phenomena is presented in final states with leptons and $b$-tagged jets selections. [...] ATLAS-CONF-2021-012. - 2021. Original Communication (restricted to ATLAS) - Full text

2021-03-27
11:50
 Search for new phenomena in three- or four-lepton events in $pp$ collisions at $\sqrt{s} =$ 13 TeV with the ATLAS detector A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four leptons ($3\ell$ and $4\ell$, $\ell = e,\mu$) is presented. [...] ATLAS-CONF-2021-011. - 2021. - 26 p. Original Communication (restricted to ATLAS) - Full text

2021-03-27
10:32
 Study of Higgs-boson production with large transverse momentum using the $H\rightarrow b\bar{b}$ decay with the ATLAS detector This note reports studies of Higgs boson production with sizeable transverse momentum decaying to a $b\bar{b}$ quark pair. [...] ATLAS-CONF-2021-010. - 2021. Original Communication (restricted to ATLAS) - Full text