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Why cannot the solar axes explain the observed redundancy of XENON1T?



Why cannot the solar axes explain the observed redundancy of XENON1T?

Artist shows the giant Red star emitting the axis. The electronic-shaft joints of the size needed to take into account the excess amount of XENON1T will inevitably turn other stars, like the Red Giant in the picture, into the ‘shaft light beacon’, which dramatically changes degrees. light and their evolution. Image Provider: Di Luzio et al.

For several decades, physicists and astrophysicists have hypothesized the existence of dark matter in the universe. This elusive matter will be made up of particles that do not absorb, reflect or emit light and therefore cannot be detected using conventional instruments to observe the particles.


One of the most promising dark matter candidates is the axion. Axions are hypothetical particles first introduced to explain the anomalous observations associated with strong nuclear interactions. Later, theoretical physicists have suggested that the axes that make up the mass fraction of the universe have yet to be taken into account and therefore could essentially be dark matter. Since then, countless groups around the world have been searching for axes using a variety of powerful and sophisticated detectors.

A few months ago, an international research group called XENON Collaboration published new data collected by XENON1T, a sensitive detector of the interactions between dark matter and ordinary particles. This data contains many surprising events that could be a hint of the existence of particles that have never been observed before, such as the solar axis.

Researchers at Deutsches Elektronen-Synchrotron (DESY), University of Barcelona, ​​University of Barry and Laboratori Nazionali di Frascati (INFN) recently examined data collected by the XENON1T detector in hopes of better understanding. whether the detected excess amount may, in fact, manifest the solar axis. Results of their analysis and considerations, published in Letter of physical assessment, seems to exclude the possibility that the solar axes lie behind the sudden observations of XENON Collaboration.

“When the XENON1T results are published, we are doing a thorough study of the effects of axion emissions from various astrophysical objects”, Luca Di Luzio, Marco Fedele, Maurizio Giannotti, Federico Mescia and Enrico Nardi, researchers who have taken out of the study, told Phys.org, “Therefore, we are in an optimal situation to easily realize that specific axis properties follow The requirement for XENON1T’s explanation strongly contradicts observations of stellar evolution. “

In their recent paper, Di Luzio and his colleagues point out that the solar axis hypothesis of the residual XENON1T is incorrect, as it contradicts previous astrophysical observations. Their hope is that by eliminating this possibility, their work will encourage other groups to identify and explore alternative explanations. According to the researchers, the redundancy is more likely the result of an unresolved problem with an experimental setup or an indication of another strange physical phenomenon.

Why cannot the solar axes explain the observed redundancy of XENON1T

Explanation of the XENON1T anomalous signal requires that the axis couplings with the photons and electrons are located within the blue region of this diagram. However, astrophysical observations imply that the allowable region of two identical joints cannot extend beyond the red zone. The large separation between the two regions allowed the researchers to conclude that the XENON1T data could not be calculated according to the solar axis. Image Provider: Di Luzio et al.

The solar axis cannot explain the XENON1T anomaly simply because when compared with other types of stars with a much greater core density and temperature, the sun does not produce axes, the researchers explained. very effective “. “If the observed redundancy is explained by the sun’s axis of rotation, then the other types of stars will create too many axes, which will shine like intense ‘beacons’, losing energy from the core. inside at such great speed that their evolution would have changed dramatically. This would seriously contradict many past astronomical observations. “

An example of astronomical data that contradicts the solar axis hypothesis is the observation of stellar populations. To explain the XENON1T excess, the solar axes would in fact need such parameters that the entire stellar population, the so-called Horizontal Branch Stellar (HB), would be very rare. If so, no HB stars have been found in nearby globular clusters, where researchers have actually discovered some of them.

“Our research should primarily be understood as a contribution to keeping community efforts on track,” the researchers said. “Initial enthusiasm for a possible ‘axion discovery’ may have deflected experimental and theoretical efforts in a direction that was, in fact, a dead end.”

In addition to excluding the possibility of solar axes explaining XENON1T redundancy, recent work done by Di Luzio and his colleagues emphasized the importance of careful consideration of astrophysics. of axial models when trying to evaluate their phenomenological viability. In their paper, the researchers emphasize the importance of the relationship between axions and astrophysics, since the first evidence for the existence of axions may eventually come directly from object observations. astrophysics.

The team is currently conducting further studies to explore axion physics. These studies focus on a wide range of topics, including cosmic consequences and the astrophysics of axions, axion modeling and the phenomenological aspects of the axion search performed in both experiments in the laboratory and on the ground.

“Each member of our collaboration has specific skills in different aspects of axion physics,” said the researchers. “As a partnership, we are currently conducting a thorough analysis of a large number of astrophysical observable objects, some of which exhibit interesting differences between projects. theoretical predictions and observations Although considering the significance level of each anomaly to a moderate degree, a global analysis may reveal a consistent pattern and could lead to an interpretation of a specific shaft type number. ”


Observe redundant events in XENON1T dark matter experiment


More information:
Luca Di Luzio et al. The solar axis cannot explain the redundancy of XENON1T, Letter of physical assessment (Year 2020). DOI: 10.1103 / PhysRevLett.125.131804

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Quote: Why the solar axes cannot explain the observed XENON1T redundancy (2020, November 5) retrieved November 5, 2020 from https://phys.org/news/2020-11 -solar-axions-xenon1t-excess.html

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