Zeynep Demiragli

Boston University

1240 Papers

3.5K Citations

Zeynep Demiragli is an academic researcher from Boston University. The author has contributed to research in topics: Large Hadron Collider & Lepton. The author has an hindex of 114, co-authored 979 publications. Previous affiliations of Zeynep Demiragli include CERN & Massachusetts Institute of Technology.

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Papers

Journal Article•10.1016/j.physletb.2025.139526

Measurement of the Drell–Yan forward-backward asymmetry and of the effective leptonic weak mixing angle in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo linebreak="goodbreak"

A. Hayrapetyan, +2302 more

- 01 May 2025

- Physics Letters B

Journal Article•10.1007/jhep06(2025)144

Search for bosons of an extended Higgs sector in b quark final states in proton-proton collisions at $$ \sqrt{\textrm{s}} $$ = 13 TeV

Vladimir Chekhovsky, +2333 more

- 10 Feb 2025

- Journal of High Energy Physics

TL;DR: A search for beyond-standard-model neutral Higgs bosons decaying to bottom quarks is performed in 13 TeV proton-proton collisions, setting upper limits on production cross section times branching fraction for Higgs bosons in the 125-1800 GeV mass range.

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•Journal Article•10.1007/JHEP07(2016)027

Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at √s= 8 TeV

Vardan Khachatryan, +2365 more

- 09 Feb 2016

- Journal of High Energy Physics

TL;DR: In this article, a search for the top squark t_1, the lighter of the two supersymmetric partners of the top quark, is reported from a search of 19.7 fb^(−1) of proton-proton collisions at √s = 8 TeV collected with the CMS detector at the LHC.

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Journal Article•10.1016/j.physletb.2025.139462

Search for rare decays of the Z and Higgs bosons to a J<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mo stretchy="false">/</mml:mo><mml:mspace width="-1.00pt"/><mml:mi mathvariant="normal">ψ</mml:mi></mml:math> or ψ(2S) meson and a photon in proton-proton collisions

A. Hayrapetyan, +2261 more

- 01 Apr 2025

- Physics Letters B

Abstract: A search is presented for rare decays of the Z and Higgs bosons to a photon and a J/$\psi$ or a $\psi$(2S) meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: $\mathcal{B}$(H $\to$ J/$\psi \gamma$) $\lt$ 2.6 $\times$ 10$^{-4}$, $\mathcal{B}$(H $\to$ $\psi$(2S)$\gamma$) $\lt$ 9.9 $\times$ 10$^{-4}$, $\mathcal{B}$(Z $\to$ J/$\psi \gamma$) $\lt$ 0.6 $\times$ 10$^{-6}$, and $\mathcal{B}$(Z $\to$ $\psi$(2S)$\gamma$) $\lt$ 1.3 $\times$ 10$^{-6}$. The ratio of the Higgs boson coupling modifiers $\kappa_\mathrm{c} / \kappa_\gamma$ is constrained to be in the interval ($-$157, $+$199) at 95% confidence level. Assuming $\kappa_\gamma = 1$, this interval becomes ($-$166, $+$208).

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•Journal Article•10.1007/JHEP07(2020)125

Measurement of the cross section for t t ¯ production with additional jets and b jets in pp collisions at √s = 13 TeV

Albert M. Sirunyan, +2362 more

- 20 Jul 2020

- Journal of High Energy Physics

TL;DR: In this article, the results of the measurements in the fiducial phase space for the dilepton and lepton+jets channels, respectively, are obtained, obtaining, respectively: 0.040±0.002 (stat)± 0.005 (syst) pb and 0.62±-0.07 pb.

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