Publications de Jan Steggemann

Search for Heavy Neutral Resonances Decaying to Tau Lepton Pairs in Proton-proton Collisions at √s=13 Tev

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

A search for heavy neutral gauge bosons (Z ') decaying into a pair of tau leptons is performed in proton-proton collisions at root s = 13 TeV at the CERN LHC. The data were collected with the CMS detector and correspond to an integrated luminosity of 138 f ...

AMER PHYSICAL SOC2025

Proton reconstruction with the TOTEM Roman pot detectors for high-β∗ LHC data

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. This paper presents new methods of track reconstruction, measurements of strip-level dete ...

2025

Measurements of Inclusive and Differential Cross Sections for Top Quark Production in Association with a Z Boson in Proton-proton Collisions at √s=13 Tev

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

Measurements are presented of inclusive and differential cross sections for Z boson associated production of top quark pairs (t (t) over barZ) and single top quarks (tZq or tWZ). The data were recorded in proton-proton collisions at a center-of-mass energy ...

SPRINGER2025

Search for excited tau leptons in the ττγ final state in proton-proton collisions at = 13 TeV

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

Results are presented for a test of the compositeness of the heaviest charged lepton, τ, using data collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC. The data were collected in 2016–2018 and c ...

2025

Search for medium effects using jet axis decorrelation in inclusive jets from PbPb collisions at = 5.02 TeV

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

The jet axis decorrelation in inclusive jets is studied using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The jet axis decorrelation is defined as the angular difference between two definitions of the jet axis. It i ...

2025

Installation and performance of the 3rd Veto plane at the SND@LHC detector

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Konstantin Androsov, Jan Steggemann, Elena Graverini, Ettore Zaffaroni, Mikhail Chapochnikov, Anna Mascellani, Carina Trippl

During 2022/2023 the optimal inefficiency of the Veto system of the SND@LHC detector was measured to be (7.8 ± 2.8) × 10−8. To reduce this inefficiency, a third Veto plane was installed during the 2023-2024 Year End Technical Stop. In addition, the Veto sy ...

2025

Energy-scaling behavior of intrinsic transverse-momentum parameters in Drell-Yan simulation

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

An analysis is presented based on models of the intrinsic transverse momentum (intrinsic (Formula presented)) of partons in nucleons by studying the dilepton transverse momentum in Drell-Yan events. Using parameter tuning in event generators and existing d ...

2025

Search for Nuclear Modifications of (Formula presented) Meson Production in (Formula presented)-Pb Collisions at (Formula presented)

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

Nuclear medium effects on (Formula presented) meson production are studied using the binary-collision scaled cross section ratio between events of different charged-particle multiplicities from proton-lead collisions. Data, collected by the CMS experiment ...

2025

Search for Pair Production of Heavy Particles Decaying to a Top Quark and a Gluon in the Lepton Plus Jets Final State in Proton-proton Collisions at √s=13 Tev

Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton-proton collisions at a center-of-mass energy of 13 TeV ...

SPRINGER2025

Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at s = 13 TeV

Konstantin Androsov, Jan Steggemann, Anna Mascellani, Joanna Malgorzata Wanczyk

A search for heavy, long-lived, charged particles with large ionization energy loss within the silicon tracker of the CMS experiment is presented. A data set of proton-proton collisions at a center of mass energy at s = 13 TeV, collected in 2017 and 2018 a ...

2025