The Study of Wγ production at D0: Anomalous Coupling Limits and the Radiation Amplitude Zero

Reconstructing Defect Radiation Amplitude Based on Acoustic Emission Signals under Conditions of a Plane Stress State

Russian Journal of Nondestructive Testing ◽

10.1134/s1061830920040038 ◽

2020 ◽

Vol 56 (4) ◽

pp. 328-339

Author(s):

V. N. Berkovich ◽

S. I. Builo

Keyword(s):

Acoustic Emission ◽

Stress State ◽

Plane Stress ◽

Plane Stress State ◽

Radiation Amplitude

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Photoproduction of W bosons as a test of the standard model

Canadian Journal of Physics ◽

10.1139/p91-008 ◽

1991 ◽

Vol 69 (1) ◽

pp. 52-56

Author(s):

Mark A. Samuel ◽

C. Kalman ◽

M. Frank ◽

C. Hamzaoui ◽

Guowen Li

Keyword(s):

Standard Model ◽

Magnetic Moment ◽

W Bosons ◽

Sensitive Measure ◽

The Standard Model ◽

Radiation Amplitude ◽

Colliding Beams

The photoproduction of W bosons is proposed as a means of testing the standard model. In particular, the radiation amplitude zero, which may occur in this process, provides a sensitive measure of the magnetic moment of the W bosons. Such experiments, using colliding beams, are feasible with present-day accelerators.

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Analysis of the Impact of Fault Mechanism Radiation Patterns on Macroseismic Fields in the Epicentral Area of 1998 and 2004 Krn Mountains Earthquakes (NW Slovenia)

The Scientific World JOURNAL ◽

10.1155/2014/206843 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Andrej Gosar

Keyword(s):

Site Effects ◽

Strike Slip ◽

Radiation Patterns ◽

Seismogenic Fault ◽

Active Growth ◽

Epicentral Area ◽

Slip Mechanism ◽

Radiation Amplitude ◽

The Difference ◽

The Impact

Two moderate magnitude (Mw = 5.6 and 5.2) earthquakes in Krn Mountains occurred in 1998 and 2004 which had maximum intensity VII-VIII and VI-VII EMS-98, respectively. Comparison of both macroseismic fields showed unexpected differences in the epicentral area which cannot be explained by site effects. Considerably, different distribution of the highest intensities can be noticed with respect to the strike of the seismogenic fault and in some localities even higher intensities have been estimated for the smaller earthquake. Although hypocentres of both earthquakes were only 2 km apart and were located on the same seismogenic Ravne fault, their focal mechanisms showed a slight difference: almost pure dextral strike-slip for the first event and a strike-slip with small reverse component on a steep fault plane for the second one. Seismotectonically the difference is explained as an active growth of the Ravne fault at its NW end. The radiation patterns of both events were studied to explain their possible impact on the observed variations in macroseismic fields and damage distribution. Radiation amplitude lobes were computed for three orthogonal directions: radial P, SV, and SH. The highest intensities of both earthquakes were systematically observed in directions of four (1998) or two (2004) large amplitude lobes in SH component (which corresponds mainly to Love waves), which have significantly different orientation for both events. On the other hand, radial P direction, which is almost purely symmetrical for the strike-slip mechanism of 1998 event, showed for the 2004 event that its small reverse component of movement has resulted in a very pronounced amplitude lobe in SW direction where two settlements are located which expressed higher intensities in the case of the 2004 event with respect to the 1998 one. Although both macroseismic fields are very complex due to influences of multiple earthquakes, retrofitting activity after 1998, site effects, and sparse distribution of settlements, unusual differences in observed intensities can be explained with different radiation patterns.

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ttH anomalous coupling in double Higgs production

Journal of High Energy Physics ◽

10.1007/jhep04(2014)011 ◽

2014 ◽

Vol 2014 (4) ◽

Cited By ~ 42

Author(s):

Kenji Nishiwaki ◽

Saurabh Niyogi ◽

Ambresh Shivaji

Keyword(s):

Higgs Production ◽

Anomalous Coupling

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Zeros of amplitude in the associated production of photon and leptoquark at $$\varvec{e}$$-$$\varvec{p}$$ collider

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09090-z ◽

2021 ◽

Vol 81 (4) ◽

Author(s):

Priyotosh Bandyopadhyay ◽

Saunak Dutta ◽

Anirban Karan

Keyword(s):

Standard Model ◽

Gauge Group ◽

Single Photon ◽

Tree Level ◽

Associated Production ◽

The Standard Model ◽

Radiation Amplitude ◽

Complementary Set

AbstractThough various extensions of the Standard Model with higher gauge group predict the existence of leptoquarks, none of them has been observed yet at any of the colliders. In this paper, we study the prospect of several past and future $$e$$ e -$$p$$ p colliders like HERA, LHeC and FCC-he to detect them through radiation amplitude zero. We find that the leptoquarks showing zeros in the tree-level single-photon amplitudes at $$e$$ e -$$p$$ p collider lie within the complementary set of those exhibiting zeros at e-$$\gamma $$ γ collider. We present a PYTHIA-based analysis for HERA, LHeC and FCC-he (run II) to detect the leptoquarks with masses 70 GeV, 900 GeV and 1.5 TeV (2.0 TeV) respectively through radiation amplitude zero.

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