Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Christian Spethmann"'
Autor:
Sean Fraser, Andi Hektor, Gert Hütsi, Kristjan Kannike, Carlo Marzo, Luca Marzola, Antonio Racioppi, Martti Raidal, Christian Spethmann, Ville Vaskonen, Hardi Veermäe
Publikováno v:
Physics Letters B, Vol 785, Iss , Pp 159-164 (2018)
The recently claimed anomaly in the measurement of the 21 cm hydrogen absorption signal by EDGES at z∼17, if cosmological, requires the existence of new physics. The possible attempts to resolve the anomaly rely on either (i) cooling the hydrogen g
Externí odkaz:
https://doaj.org/article/d53a78ab300d4e859a674dca91c6b8ef
Autor:
Stefano Di Chiara, Andrew Fowlie, Sean Fraser, Carlo Marzo, Luca Marzola, Martti Raidal, Christian Spethmann
Publikováno v:
Nuclear Physics B, Vol 923, Iss C, Pp 245-257 (2017)
There has been a steady interest in flavor anomalies and their global fits as ideal probes of new physics. If the anomalies are real, one promising explanation is a new Z′ gauge boson with a flavor-changing coupling to bottom and strange quarks and
Externí odkaz:
https://doaj.org/article/30aaa1c230d845d9871c6bd35aeb7524
Publikováno v:
Physics Letters B, Vol 749, Iss C, Pp 236-241 (2015)
While dark matter self-interactions may solve several problems with structure formation, so far only the effects of two-body scatterings of dark matter particles have been considered. We show that, if a subdominant component of dark matter is charged
Externí odkaz:
https://doaj.org/article/80a0f96139314236994fad592790dc0c
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 1, p 014001 (2008)
Here we compute the ion distribution produced by an electron beam when ion-clearing electrodes are installed. This ion density is established as an equilibrium between gas ionization and ion clearing. The transverse ion distributions are shown to str
Externí odkaz:
https://doaj.org/article/b6027192681247e88ccd0bf33046f21f
Autor:
Antonio Racioppi, Martti Raidal, Andi Hektor, Kristjan Kannike, Gert Hütsi, Christian Spethmann, Ville Vaskonen, Hardi Veermäe, Carlo Marzo, Luca Marzola, Sean Fraser
Publikováno v:
Physics Letters
Physics Letters B, Vol 785, Iss, Pp 159-164 (2018)
Physics Letters B, Vol 785, Iss, Pp 159-164 (2018)
The recently claimed anomaly in the measurement of the 21 cm hydrogen absorption signal by EDGES at $z\sim 17$, if cosmological, requires the existence of new physics. The possible attempts to resolve the anomaly rely on either (i) cooling the hydrog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::592d98378ae0cdf38e29065c5a7a009a
https://doi.org/10.1016/j.physletb.2018.08.035
https://doi.org/10.1016/j.physletb.2018.08.035
Autor:
Sean Fraser, Martti Raidal, Luca Marzola, Stefano Di Chiara, Christian Spethmann, Carlo Marzo, Andrew Fowlie
Publikováno v:
Nuclear Physics B. 923:245-257
There has been a steady interest in flavor anomalies and their global fits as ideal probes of new physics. If the anomalies are real, one promising explanation is a new Z′ gauge boson with a flavor-changing coupling to bottom and strange quarks and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa33d67aef48ab4de73bce07da4c966
https://doi.org/10.1016/j.nuclphysb.2017.08.003
https://doi.org/10.1016/j.nuclphysb.2017.08.003
Autor:
Emidio Gabrielli, Kristjan Kannike, Hardi Veermäe, Barbara Mele, Martti Raidal, Christian Spethmann
Publikováno v:
Physics Letters B
Physics Letters B, Vol 756, Iss C, Pp 36-41 (2016)
Physics Letters B, Vol 756, Iss C, Pp 36-41 (2016)
The evidence for a new singlet scalar particle from the 750 GeV diphoton excess, and the absence of any other signal of new physics at the LHC so far, suggest the existence of new coloured scalars. To study this possibility, we propose a supersymmetr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bb6c803a9cd8874c55f10f4d8708111
Publikováno v:
Physical Review
Recent measurements of semileptonic B-meson decays seemingly imply violations of lepton flavor universality beyond the Standard Model predictions. With three-level explanations based on extended Higgs sectors being strongly challenged by the measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f4e4eb6d227a3fd4d2b19096ddcf50a
http://repo.scoap3.org/api
http://repo.scoap3.org/api
The abundance of primordial black holes (PBHs) in the mass range $0.1 - 10^3 M_\odot$ can potentially be tested by gravitational wave observations due to the large merger rate of PBH binaries formed in the early universe. To put the estimates of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36e060a644a98f3cfcec57be91050af0
Publikováno v:
Journal of High Energy Physics
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-28 (2017)
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-28 (2017)
We consider classically scale-invariant theories with non-minimally coupled scalar fields, where the Planck mass and the hierarchy of physical scales are dynamically generated. The classical theories possess a fixed point, where scale invariance is s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d661b17eec809e767751b98833084490
http://repo.scoap3.org/api
http://repo.scoap3.org/api