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Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full ep data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of…

High Energy Physics - Experiment · Physics 2012-08-27 H1 Collaboration

In collider-based particle and nuclear physics experiments, data are produced at such extreme rates that only a subset can be recorded for later analysis. Typically, algorithms select individual collision events for preservation and store…

High Energy Physics - Phenomenology · Physics 2022-12-20 Jack H. Collins , Yifeng Huang , Simon Knapen , Benjamin Nachman , Daniel Whiteson

We discuss sensitivities to lepton flavor violating (and conserving) interactions at future muon colliders, especially at $\mu^+\mu^+$ colliders. Compared with the searches for rare decays of $\mu$ and $\tau$, we find that the TeV-scale…

High Energy Physics - Phenomenology · Physics 2025-04-14 Kåre Fridell , Ryuichiro Kitano , Ryoto Takai

A search for nu_bar_mu to nu_bar_e oscillations has been conducted at the Los Alamos Meson Physics Facility using nu_bar_mu from mu+ decay at rest. The nu_bar_e are detected via the reaction (nu_bar_e,p) -> (e+,n), correlated with the 2.2…

We investigate the ability of $\mu\rightarrow e$ facilities, Mu2e and COMET, to probe, or discover, new physics with their detector validation datasets. The validation of the detector response may be performed using a dedicated run with…

High Energy Physics - Phenomenology · Physics 2024-09-04 Richard J. Hill , Ryan Plestid , Jure Zupan

Recent advancements in Mixture of Experts (MoE) models have significantly increased their parameter scale as well as model performance. Extensive offloading techniques have been proposed to address the GPU memory limitations of MoE…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-03 Zhibin Wang , Zhonghui Zhang , Yuhang Zhou , Zibo Wang , Mo Zhou , Peng Jiang , Weilin Cai , Chengying Huan , Rong Gu , Sheng Zhong , Chen Tian

Using data collected with the BaBar detector between 1999 and 2001, we describe a preliminary search for the neutrinoless decay Tau to Mu Gamma. This data sample includes data collected both on and off the Upsilon(4S) resonance and…

High Energy Physics - Experiment · Physics 2009-04-02 Christopher Brown

Bloom filters are a fundamental data structure for approximate membership queries, with applications ranging from data analytics to databases and genomics. Several variants have been proposed to accommodate parallel architectures. GPUs,…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-12-18 Daniel Jünger , Kevin Kristensen , Yunsong Wang , Xiangyao Yu , Bertil Schmidt

The GERDA experiment located at the LNGS searches for neutrinoless double beta (0\nu\beta\beta) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I of the experiment eight semi-coaxial and five BEGe type detectors…

Instrumentation and Detectors · Physics 2013-12-09 M. Agostini , M. Allardt , E. Andreotti , A. M. Bakalyarov , M. Balata , I. Barabanov , M. Barnabe Heider , N. Barros , L. Baudis , C. Bauer , N. Becerici-Schmidt , E. Bellotti , S. Belogurov , S. T. Belyaev , G. Benato , A. Bettini , L. Bezrukov , T. Bode , V. Brudanin , R. Brugnera , D. Budjáš , A. Caldwell , C. Cattadori , A. Chernogorov , F. Cossavella , E. V. Demidova , A. Domula , V. Egorov , R. Falkenstein , A. Ferella , K. Freund , N. Frodyma , A. Gangapshev , A. Garfagnini , C. Gotti , P. Grabmayr , V. Gurentsov , K. Gusev , K. K. Guthikonda , W. Hampel , A. Hegai , M. Heisel , S. Hemmer , G. Heusser , W. Hofmann , M. Hult , L. V. Inzhechik , L. Ioannucci , J. Janicskó Csáthy , J. Jochum , M. Junker , T. Kihm , I. V. Kirpichnikov , A. Kirsch , A. Klimenko , K. T. Knöpfle , O. Kochetov , V. N. Kornoukhov , V. V. Kuzminov , M. Laubenstein , A. Lazzaro , V. I. Lebedev , B. Lehnert , H. Y. Liao , M. Lindner , I. Lippi , X. Liu , A. Lubashevskiy , B. Lubsandorzhiev , G. Lutter , C. Macolino , A. A. Machado , B. Majorovits , W. Maneschg , M. Misiaszek , I. Nemchenok , S. Nisi , C. O'Shaughnessy , L. Pandola , K. Pelczar , G. Pessina , A. Pullia , S. Riboldi , N. Rumyantseva , C. Sada , M. Salathe , C. Schmitt , J. Schreiner , O. Schulz , B. Schwingenheuer , S. Schönert , E. Shevchik , M. Shirchenko , H. Simgen , A. Smolnikov , L. Stanco , H. Strecker , M. Tarka , C. A. Ur , A. A. Vasenko , O. Volynets , K. von Sturm , V. Wagner , M. Walter , A. Wegmann , T. Wester , M. Wojcik , E. Yanovich , P. Zavarise , I. Zhitnikov , S. V. Zhukov , D. Zinatulina , K. Zuber , G. Zuzel

ALICE records Pb-Pb collisions in Run 3 at an unprecedented rate of 50 kHz, storing all data in continuous readout (triggerless) mode. The main purpose of the ALICE online computing farm is the calibration of the detectors and the…

Instrumentation and Detectors · Physics 2025-02-14 David Rohr

A broken lepton family symmetry can lead to muon decay to a Familon \[\mu \to {\chi _{Familon}} + e .\] We propose to search for two body muon decay to a Familon in the mass range from 86 to 105 MeV/c$^2$, by observing stopped positive…

High Energy Physics - Experiment · Physics 2021-10-06 D . Koltick , S. Huang , F. Bergin , J. Chen , H. Cao

A search for physics beyond the standard model in events with at least three leptons is presented. The data sample, corresponding to an integrated luminosity of 19.5 inverse femtobarns of proton-proton collisions with center-of-mass energy…

High Energy Physics - Experiment · Physics 2014-08-27 CMS Collaboration

The preformation factor quantifies the probability of {\alpha} particles preforming on the surface of the parent nucleus in decay theory and is closely related to the study of {\alpha} clustering structure. In this work, a multilayer…

Nuclear Theory · Physics 2025-04-04 Jiaqi Luo , Yang Xu , Xiaolong Li , Junxiang Wang , Yangjie Zhang , Jungang Deng , Fang Zhang , Nana Ma

The simulation of high-energy physics collision events is a key element for data analysis at present and future particle accelerators. The comparison of simulation predictions to data allows looking for rare deviations that can be due to…

High Energy Physics - Experiment · Physics 2024-07-16 Francesco Vaselli , Filippo Cattafesta , Patrick Asenov , Andrea Rizzi

We analyze the most general dimension six effective Lagrangian, invariant under the flavour symmetry A4 x Z3 x U(1) proposed to reproduce the near tri-bimaximal lepton mixing observed in neutrino oscillations. The effective Lagrangian…

High Energy Physics - Phenomenology · Physics 2014-11-21 Ferruccio Feruglio , Alessio Paris

In general-purpose particle detectors, the particle-flow algorithm may be used to reconstruct a comprehensive particle-level view of the event by combining information from the calorimeters and the trackers, significantly improving the…

Data Analysis, Statistics and Probability · Physics 2021-06-10 Joosep Pata , Javier Duarte , Jean-Roch Vlimant , Maurizio Pierini , Maria Spiropulu

Charged lepton-flavor violating processes are extremely rare in the Standard Model, but they may occur in several beyond-the-Standard Model theories, including Supersymmetry or models with leptoquarks or compositeness. We present a search…

High Energy Physics - Experiment · Physics 2008-12-08 The BABAR Collaboration , B. Aubert

We demonstrate that mu/e slepton mixing is significantly more restricted than previously thought within the already remarkably flavor-safe R-symmetric supersymmetric standard model. We calculate bounds from mu to e gamma, mu to 3e and, most…

High Energy Physics - Phenomenology · Physics 2010-11-25 Ricky Fok , Graham D. Kribs

The VIP collaboration operates a Broad Energy Germanium detector at the Gran Sasso National Laboratory to measure radiation in the few keV to 100 keV range, aiming to search for spontaneous collapse induced radiation and atomic transitions…

Experiment E865 at the Brookhaven AGS was set up primarily to search for the lepton flavour violating decay $K^+\to \pi^+\mu^+e^-$ ($K_{\pi\mu e}$) with high sensitivity. The flexibility of the apparatus allowed also to obtain more than an…

High Energy Physics - Experiment · Physics 2007-05-23 Peter Truoel