Results 21 to 30 of about 992,502 (288)

Higgs physics confronts the MW anomaly

Physics Letters B, 2022
The recent high-precision measurement of the W mass by the CDF collaboration is in sharp tension with the Standard Model prediction as obtained by the electroweak fit. If confirmed, this finding can only be explained in terms of new physics effects.
Luca Di Luzio, Ramona Gröber, Paride Paradisi   +2 more
doaj  

Rare and Different: Anomaly Scores from a combination of likelihood and out-of-distribution models to detect new physics at the LHC

SciPost Physics, 2022
We propose a new method to define anomaly scores and apply this to particle physics collider events. Anomalies can be either rare, meaning that these events are a minority in the normal dataset, or different, meaning they have values that are not ...
Sascha Caron, Luc Hendriks, Rob Verheyen
doaj   +1 more source

Hamiltonian approach to the torsional anomalies and its dimensional ladder [PDF]

Phys. Rev. B 101, 165201 (2020), 2019
Torsion can cause various anomalies in various dimensions, including the $\left(3+1\right)$-dimensional $[(3+1)D]$ Nieh-Yan anomaly, the $\left(2+1\right)$D Hughes-Leigh-Fradkin (HLF) parity anomaly, and the $\left(3+1\right)$D, $\left(1+1\right)$D chiral energy-momentum anomaly. We study these anomalies from the Hamiltonian approach.
arxiv   +1 more source

New Physics Suggested by Atomki Anomaly

Frontiers in Physics, 2019
We consider several extensions of the Standard Model (SM) which can explain the anomalies observed by the Atomki collaboration in the decay of excited states of Beryllium via a new boson with a mass around 17 MeV yielding e+e− pairs.
Luigi Delle Rose, Luigi Delle Rose, Shaaban Khalil, Simon J. D. King, Simon J. D. King, Stefano Moretti, Stefano Moretti   +6 more
doaj   +1 more source

The Dark Machines Anomaly Score Challenge: Benchmark Data and Model Independent Event Classification for the Large Hadron Collider

SciPost Physics, 2022
We describe the outcome of a data challenge conducted as part of the Dark Machines Initiative and the Les Houches 2019 workshop on Physics at TeV colliders.
T. Aarrestad, M. van Beekveld, M. Bona, A. Boveia, S. Caron, J. Davies, A. De Simone, C. Doglioni, J. M. Duarte, A. Farbin, H. Gupta, L. Hendriks, L. Heinrich, J. Howarth, P. Jawahar, A. Jueid, J. Lastow, A. Leinweber, J. Mamuzic, E. Merényi, A. Morandini, P. Moskvitina, C. Nellist, J. Ngadiuba, B. Ostdiek, M. Pierini, B. Ravina, R. Ruiz de Austri, S. Sekmen, M. Touranakou, M. Vaškevičiūte, R. Vilalta, J. R. Vlimant, R. Verheyen, M. White, E. Wulff, E. Wallin, K. A. Wozniak, Z. Zhang
doaj   +1 more source

New Physics Agnostic Selections For New Physics Searches [PDF]

EPJ Web of Conferences, 2020
We discuss a model-independent strategy for boosting new physics searches with the help of an unsupervised anomaly detection algorithm. Prior to a search, each input event is preprocessed by the algorithm - a variational autoencoder (VAE).
Woźniak Kinga Anna, Cerri Olmo, Duarte Javier M., Möller Torsten, Ngadiuba Jennifer, Nguyen Thong Q., Pierini Maurizio, Spiropulu Maria, Vlimant Jean-Roch   +8 more
doaj   +1 more source

Conformal Anomalies in Noncommutative Gauge Theories [PDF]

Phys.Rev. D66 (2002) 085008, 2001
We calculate conformal anomalies in noncommutative gauge theories by using the path integral method (Fujikawa's method). Along with the axial anomalies and chiral gauge anomalies, conformal anomalies take the form of the straightforward Moyal deformation in the corresponding conformal anomalies in ordinary gauge theories.
arxiv   +1 more source

Dispersive approach to non-Abelian axial anomaly [PDF]

Phys. Rev. D 99, 016008 (2019), 2018
Manifestations of strong and electromagnetic axial anomalies in two-photon decays of $\eta$ and $\eta'$ mesons are studied. Applying dispersive approach to axial anomaly in the singlet current, we obtain an anomaly sum rule containing strong and electromagnetic anomaly contributions.
arxiv   +1 more source

On Exotic Consistent Anomalies in (1+1)$d$: A Ghost Story [PDF]

SciPost Phys. 10, 119 (2021), 2020
We revisit 't Hooft anomalies in (1+1)$d$ non-spin quantum field theory, starting from the consistency and locality conditions, and find that consistent U(1) and gravitational anomalies cannot always be canceled by properly quantized (2+1)$d$ classical Chern-Simons actions. On the one hand, we prove that certain exotic anomalies can only be realized by
arxiv   +1 more source

Gravitational anomalies in a dispersive approach [PDF]

Phys.Lett. B480 (2000) 200-206, 2000
The gravitational anomalies in two dimensions, specifically the Einstein anomaly and the Weyl anomaly, are fully determined by means of dispersion relations. In this approach the anomalies originate from the peculiar infrared feature of the imaginary part of the relevant formfactor which approaches a $\delta$-function singularity at zero momentum ...
arxiv   +1 more source