Identification of boosted Higgs bosons decaying into $b$-quark pairs with the ATLAS detector at 13 $\text {TeV}

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2019, Vol.79 (10)
• Main Authors: Aad, Georges, Abbott, Brad, Abbott, Dale Charles, Abdinov, Ovsat, Abed Abud, Adam, Abeling, Kira, Abhayasinghe, Deshan Kavishka, Abidi, Syed Haider, Abouzeid, Ossama, Abraham, Nicola, Abramowicz, Halina, Abreu, Henso, Abulaiti, Yiming, Acharya, Bobby Samir, Achkar, Baida, Adachi, Shunsuke, Adam, Lennart, Adam Bourdarios, Claire, Adamczyk, Leszek, Adamek, Lukas, Adelman, Jahred, Adersberger, Michael, Adiguzel, Aytul, Adorni, Sofia, Adye, Tim, Affolder, Tony, Afik, Yoav, Agapopoulou, Christina, Agaras, Merve Nazlim, Aggarwal, Anamika, Agheorghiesei, Catalin, Aguilar Saavedra, Juan Antonio, Ahmadov, Faig, Ahmed, Waleed Syed, Ai, Xiaocong, Aielli, Giulio, Akatsuka, Shunichi, Akesson, Torsten Paul Ake, Akilli, Ece, Akimov, Andrei, Al Khoury, Konie, Alberghi, Gian Luigi, Albert, Justin, Alconada Verzini, Maria Josefina, Alderweireldt, Sara Caroline, Aleksa, Martin, Aleksandrov, Igor, Alexa, Calin, Alexandre, Didier, Alexopoulos, Theodoros, Alfonsi, Alice, Alhroob, Muhammad, Ali, Babar, Alimonti, Gianluca, Alison, John, Alkire, Steven Patrick, Allaire, Corentin, Allbrooke, Benedict, Allen, Benjamin William, Allport, Phillip, Aloisio, Alberto, Alonso, Alejandro, Alonso, Francisco, Alpigiani, Cristiano, Alshehri, Azzah Aziz, Alvarez Estevez, Manuel, Alvarez Piqueras, Damian, Alviggi, Mariagrazia, Amaral Coutinho, Yara, Ambler, Alessandro, Ambroz, Luca, Amelung, Christoph, Amidei, Dante Eric, Amor dos Santos, Susana Patricia, Amoroso, Simone, Amrouche, Cherifa Sabrina, An, Fenfen, Anastopoulos, Christos, Andari, Nansi, Andeen, Timothy, Anders, Christoph Falk, Anders, John Kenneth, Andreazza, Attilio, Andrei, George Victor, Anelli, Christopher Ryan, Angelidakis, Stylianos, Angerami, Aaron, Anisenkov, Alexey, Annovi, Alberto, Antel, Claire, Anthony, Matthew Thomas, Antonelli, Mario, Antrim, Daniel Joseph, Anulli, Fabio, Aoki, Masato, Aparisi Pozo, Javier Alberto, Aperio Bella, Ludovica, Arabidze, Giorgi, Araque Espinosa, Juan Pedro, Araujo Ferraz, Victor
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-019-7335-x

This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, $H \rightarrow b\bar{b}$ , for proton–proton collision data collected by the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy $\sqrt{s}=13$   $\text {TeV}$ . These decays are reconstructed from calorimeter jets found with the anti- $k_{t}$ $R = 1.0$ jet algorithm. To tag Higgs bosons, a combination of requirements is used: b-tagging of $R = 0.2$ track-jets matched to the large-R calorimeter jet, and requirements on the jet mass and other jet substructure variables. The Higgs boson tagging efficiency and corresponding multijet and hadronic top-quark background rejections are evaluated using Monte Carlo simulation. Several benchmark tagging selections are defined for different signal efficiency targets. The modelling of the relevant input distributions used to tag Higgs bosons is studied in 36 fb$^{-1}$ of data collected in 2015 and 2016 using $g\rightarrow b\bar{b}$ and $Z(\rightarrow b\bar{b})\gamma $ event selections in data. Both processes are found to be well modelled within the statistical and systematic uncertainties.