Journal Article

Search for a heavy resonance decaying into a Z and a Higgs boson in events with an energetic jet and two electrons, two muons, or missing transverse momentum in proton-proton collisions at√s̅= 13 TeV

Walkingshaw Pass, Katie, Bakshi, Amandeep Singh, Eble, Florian, Bhattacharya, Saptaparna, Seif El Nasr-Storey, Sarah, Wen, Yiwen, Marini, Andrea Carlo, Müller, Denise, Smith, Caleb, Makarenko, Vladimir, Malcles, Julie, Laktineh, Imad Baptiste, Belyaev, Alexander, Mercadante, Pedro G., Tae, Bongho, Steggemann, Jan, Dierlamm, Alexander, Taylor, Lucas, Mannelli, Marcello, Rabbertz, Klaus, Riccardi, Cristina, Zygala, Lara, Bam, Bhim, Aushev, Tagir, Pozniak, Krzysztof, De Roeck, Albert, Soffi, Livia, Ardino, Rocco, Wozniak, Kinga Anna, Smith, Nicholas, Marchegiani, Matteo, Tabb, William, Cuffiani, Marco, Cerci, Salim, Lee, Kyeongpil, Puerta Pelayo, Jesus, Santoro, Alberto, Schmitt, Michael Henry, Greene, Senta, Chung, Heewon, Delaere, Christophe, Brigljevic, Vuko, Meschini, Marco, Dasu, Sridhara, Field, Richard D., Nowotny, Fabian, Chatzistavrou, Theodoros, Borgonovi, Lisa, De Bruyn, Isabelle, Zhang, Danyi, Goy Lopez, Silvia, Lammel, Stephan, Cavallo, Francesca Romana, Monk, David Gabriel, Freer, Chad, Rehm, Florian, Chang, Philip, Gouskos, Loukas, Strautnieks, Normunds Ralfs, Kosmoglou Kioseoglou, Polidam

2025

Overview

A search is presented for a heavy resonance decaying into a Z boson and a Higgs (H) boson. The analysis is based on data from proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 138 fb$^{−1}$, recorded with the CMS experiment in the years 2016–2018. Resonance masses between 1.4 and 5 TeV are considered, resulting in large transverse momenta of the Z and H bosons. Final states that result from Z boson decays to pairs of electrons, muons, or neutrinos are considered. The H boson is reconstructed as a single large-radius jet, recoiling against the Z boson. Machine-learning flavour-tagging techniques are employed to identify decays of a Lorentz-boosted H boson into pairs of charm or bottom quarks, or into four quarks via the intermediate H → WW$^{*}$ and ZZ$^{*}$ decays. The analysis targets H boson decays that were not generally included in previous searches using the H → $ \\textrm{b}\\overline{\\textrm{b}} $ channel. Compared with previous analyses, the sensitivity for high resonance masses is improved significantly in the channel where at most one b quark is tagged.[graphic not available: see fulltext]

• Publisher: Springer Nature
• Subject: beyond Standard Model / Beyond Standard Model, Hadron-Hadron Scattering / hadron-hadron scattering / Jets / PHYSICS OF ELEMENTARY PARTICLES AND FIELDS / Vector Boson Production