2025-08-15
10:39 |
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2025-08-12
22:02 |
A Long-Baseline Atom Interferometer at CERN LHC Point 4: Implementation Study
/ Arduini, G. ; Buchmüller, O. (Oxford U.) ; Bud, T.A. ; Calatroni, S. ; Crespo-Lopez, O. ; Devienne, A. ; Ellis, J. (King's Coll. London) ; Hakulinen, T. ; Infantino, A. ; Lafarge, D. 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; arXiv:2508.09694.-
Geneva : CERN, 2025 - 10 p.
Fulltext: CERN-PBC Report-2025-004 - PDF; 2508.09694 - 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; Updated version after addressing CDS comments: : PDF;
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2025-07-25
16:16 |
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2025-07-22
05:41 |
$g g \to Z H$ : 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 $\mathcal{B}\lesssim 10^{-5}$. 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, $\kappa$'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.
Fulltext: PDF;
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