2025-08-12
22:02 |
A Long-Baseline Atom Interferometer at CERN LHC Point 4: Implementation Study
/ Calatroni, Sergio (CERN) ; Arduini, Gianluigi (CERN) ; Buchmuller, Oliver (Imperial College (GB)) ; Bud, Tamara Alice (CERN) ; Crespo-Lopez, Olivier (CERN) ; Devienne, Arnaud (CERN) ; Ellis, Jonathan R. (University of London (GB)) ; Hakulinen, Timo Tapio (CERN) ; Infantino, Angelo (CERN) ; Lafarge, Damien (CERN) et al.
Building on the previous feasibility study, this report supported by the Physics Beyond Colliders (PBC) Study Group describes the technical implementation of modifications to the PX46 shaft at LHC Point 4 during LS3 (June 2026 – June 2030) that would enable it to accommodate the installation and operation of a vertical long-baseline Atom Interferometer during Run 4 without affecting LHC operations. We specify in detail the necessary civil‐engineering work, installation of bespoke radiation shielding, deployment of access‐control systems and safety alarms, and design of a mobile elevator platform [...]
CERN-PBC-REPORT-2025-004.-
Geneva : CERN, 2025 - 33.
Fulltext: PDF;
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2025-08-06
16:32 |
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2025-08-04
16:45 |
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2025-07-29
13:59 |
Threshold improved ZH production at the LHC
/ Samanta, Kajal (Institute for Particle Physics Phenomenology, Durham University, Durham DH1 3LE, United Kingdom) ; Das, Goutam (Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, D-52056 Aachen, Germany) ; Dey, Chinmoy (Department of Physics, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India and Theoretical Physics Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India) ; Kumar, M C (Department of Physics, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India)
We present precise theoretical results for the ZH production cross section and invariant mass distribution at the Large Hadron Collider (LHC) taking into account the effects of soft gluons. We improve both quark-initiated and gluon-initiated subprocesses through threshold resummation within the QCD framework and present combined results relevant for 13.6 TeV LHC [...]
LHCHWG-2025-009.-
Geneva : CERN, 2025 - 8.
Resummation in ZH process for YR5 from LHCHWG1-VH subgroup: PDF;
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2025-07-25
16:16 |
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2025-07-22
05:41 |
gg→ZH : updated predictions at NLO QCD
/ Vitti, Marco (Institute for Theoretical Particle Physics, KIT, 76131 Karlsruhe, Germany) ; Campillo Aveleira, Benjamin (Institute for Theoretical Physics, KIT, 76131 Karlsruhe, Germany) ; Chen, Long (School of Physics, Shandong University, Jinan, 250100 Shandong, China) ; Davies, Joshua (Department of Mathematical Sciences, University of Liverpool, Liverpool, UK) ; Degrassi, Giuseppe (Dipartimento di Matematica e Fisica, Università di Roma Tre, and INFN, Sezione di Roma Tre, Rome, Italy) ; Giardino, Pier Paolo (Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain) ; Groeber, Ramona (Universita e INFN, Padova (IT)) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Jones, Stephen Philip (University of Durham (GB)) ; Kerner, Matthias (Institute for Theoretical Physics, KIT, 76131 Karlsruhe, Germany) et al.
We present state-of-the-art predictions for the inclusive cross section of gluon-initiated ZH production, following the recommendations of the LHC Higgs Working Group. In particular, we include NLO QCD corrections, where the virtual corrections are obtained from the combination of a forward expansion and a high-energy expansion, and the real corrections are exact. [...]
LHCHWG-2025-007.-
Geneva : CERN, 2025 - 14.
Fulltext: PDF; Updated version after addressing CDS comments: PDF;
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2025-07-11
23:12 |
Rare few-body decays of the Standard Model Higgs boson
/ d'Enterria, David (CERN) ; Le, Van Dung (Ho Chi Minh City U.)
We present a survey of rare and exclusive few-body decays of the standard model (SM) Higgs boson, defined as those into two to four final particles with branching fractions B≲10−5. Studies of such decays can be exploited to constrain Yukawa couplings of quarks and leptons, probe flavour-changing Higgs decays, estimate backgrounds for exotic Higgs decays into beyond-SM particles, and/or confirm quantum chromodynamics factorization with small nonperturbative corrections [...]
arXiv:2508.00466.-
Geneva : CERN, 2025 - 26 p.
Fulltext: LHCHWG-2025-006 - PDF; 2508.00466 - PDF; Second update of the contribution: PDF; Updated contribution: PDF;
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2025-07-11
08:22 |
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2025-07-08
08:52 |
Parametrisation and dictionary for CP violating Higgs interactions
/ Barducci, Daniele (Universita & INFN Pisa (IT)) ; Giardino, Pier Paolo (CERN) ; Forslund, Matthew (C. N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, NY, 11794, USA High Energy Theory Group, Physics Department, Brookhaven National Laboratory, Upton, NY 11973, USA) ; Fuentes Zamoro, Marta (Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain)
Searches for charge-parity (CP) violating interactions of the Standard Model (SM) Higgs boson are a key priority of the LHC physics program. Experimental results from ATLAS and CMS are often reinterpreted within a variety of theoretical parametrisations, the most commonly used being the Higgs basis, κ's and angles, CP fractions and effective field theories (EFT) such as the SMEFT and the Higgs EFT. [...]
LHCHWG-2025-004.-
Geneva : CERN, 2025 - 19.
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2025-06-30
11:56 |
Higgs production via vector-boson fusion at the LHC
/ Barone, Gaetano (Brown U.) ; Chen, Jiayi (Simon Fraser U.) ; Cooperstein, Stephane (UC, San Diego) ; Dolganov, Nikita (Simon Fraser U.) ; Ferrario Ravasio, Silvia (CERN) ; Haddad, Yacine (Northeastern U.) ; Höche, Stefan (Fermilab) ; Jäger, Barbara (Tubingen U.) ; Karlberg, Alexander (CERN) ; Mück, Alexander (RWTH Aachen U.) et al.
In this article, we summarise the recent experimental measurements and theoretical work on Higgs boson production via vector-boson fusion at the LHC. Along with this, we provide state-of-the-art predictions at fixed order as well as with parton-shower corrections within the Standard Model at 13.6 TeV. [...]
arXiv:2507.22574; LHCHWG-2025-003; CERN-TH-2025-126; FERMILAB-PUB-25-0410-T; FR-PHENO-25-08; MCNET-25-16; TIF-UNIMI-2025-14; TTK-25-19.-
Geneva : CERN, 2025 - 45 p.
- Published in : Public Code Repository
- Published in : Public Data Repository
Fulltext: LHCHWG-2025-003 - PDF; 353eb4a019405910bebb1823c2e35e36 - PDF; 2507.22574 - PDF; External link: Fermilab Library Server
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