Professor Daniela Bortoletto: Publications

Measurement of the $CP$-violating phase $φ_s$ in $B^0_s \to J/ψφ$ decays in ATLAS at 13 TeV

ArXiv 2001.07115 (2020)

Measurement of J/ψ production in association with a W ± boson with pp data at 8 TeV

Journal of High Energy Physics Springer 2020:1 (2020) 95

Authors:

M Aaboud, G Aad, B Abbott, DC Abbott, O Abdinov, B Abeloos, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, S Adachi, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, M Adersberger, A Adiguzel, T Adye, AA Affolder

Abstract:

A measurement of the production of a prompt J/ψ meson in association with a W± boson with W± → μν and J/ψ → μ+μ− is presented for J/ψ transverse momenta in the range 8.5–150 GeV and rapidity |yJ/ψ| < 2.1 using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton-proton centre-of-mass energy of s = 8 TeV and correspond to an integrated luminosity of 20.3 fb−1. The ratio of the prompt J/ψ plus W± cross-section to the inclusive W± cross-section is presented as a differential measurement as a function of J/ψ transverse momenta and compared with theoretical predictions using different double-parton-scattering cross-sections.

Search for the $HH \rightarrow b \bar{b} b \bar{b}$ process via vector-boson fusion production using proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ArXiv 2001.05178 (2020)

Longitudinal flow decorrelations in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV with the ATLAS detector

ArXiv 2001.04201 (2020)

Combination of searches for Higgs boson pairs in pp collisions at root s=13 TeV with the ATLAS detector

PHYSICS LETTERS B 800 (2020) ARTN 135103

Authors:

B Abbott, G Aad, C Adam Bourdarios, L Adamczyk, J Adelman, L Adamek, C Agapopoulou, A Aggarwal, Mn Agaras, Y Afik, Tp Akesson, S Akatsuka, G Aielli, E Akilli, S Alderweireldt, In Aleksandrov, M Aleksa, C Alexa, Dk Abhayasinghe, A Abed Abud, Dc Abbott, K Abeling, Sh Abidi, H Abramowicz, Os AbouZeid

Abstract:

© 2019 The Author(s) This letter presents a combination of searches for Higgs boson pair production using up to 36.1 fb−1 of proton–proton collision data at a centre-of-mass energy s=13 TeV recorded with the ATLAS detector at the LHC. The combination is performed using six analyses searching for Higgs boson pairs decaying into the bb¯bb¯, bb¯W+W−, bb¯τ+τ−, W+W−W+W−, bb¯γγ and W+W−γγ final states. Results are presented for non-resonant and resonant Higgs boson pair production modes. No statistically significant excess in data above the Standard Model predictions is found. The combined observed (expected) limit at 95% confidence level on the non-resonant Higgs boson pair production cross-section is 6.9 (10) times the predicted Standard Model cross-section. Limits are also set on the ratio (κλ) of the Higgs boson self-coupling to its Standard Model value. This ratio is constrained at 95% confidence level in observation (expectation) to −5.0<κλ<12.0 (−5.8<κλ<12.0). In addition, limits are set on the production of narrow scalar resonances and spin-2 Kaluza–Klein Randall–Sundrum gravitons. Exclusion regions are also provided in the parameter space of the habemus Minimal Supersymmetric Standard Model and the Electroweak Singlet Model.

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