scholarly journals Schwinger mechanism, Unruh effect, and production of accelerated black holes

1997 ◽  
Vol 55 (6) ◽  
pp. 3603-3613 ◽  
Author(s):  
R. Parentani ◽  
S. Massar
Keyword(s):  
Black Holes ◽  
Unruh Effect ◽  
Schwinger Mechanism

The effect of Higgs boson radiation from TeV black holes on the hadronic cross section at the LHC

2012 ◽  
Vol 90 (1) ◽  
pp. 25-37 ◽  
Author(s):  
A. Sepehri ◽  
M.E. Zomorrodian ◽  
A. Moradi Marjaneh ◽  
P. Eslami ◽  
S. Shoorvazi
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Higgs Boson ◽  
Cross Section ◽  
Cross Sections ◽  
Unruh Effect ◽  
Leading Order ◽  
Hadronic Cross Section ◽  
The Cross ◽  
Mini Black Holes

In curved space–time near TeV black holes many gluons and quarks produced by the Unruh effect interact with each other and create Higgs bosons. We study the Unruh effect and show that, for gluons and quarks, the internal stationary state of a Schwarzschild black hole can be represented by a maximally entangled two-mode squeezed state of outgoing and infalling Hawking radiation. We consider different channels for Higgs boson production near event horizons of mini black holes at the Large Hadron Collider (LHC) and obtain the cross section in each channel. We observe that the cross section of a Higgs boson produced via gluon fusion near a single black hole is much larger for smaller black hole masses. This is because the temperature of the black hole becomes larger as the mass becomes smaller and the thermal radiation of the gluons is enhanced. At lower mass, MBH < 4 TeV, the black hole will not be able to emit Higgs, but will still be able to produce a quark; for MBH < 3 TeV the black hole can only emit massless gluons. We show that as the black hole mass at the LHC increases (4 TeV < MBH < 8 TeV) most of the Higgs boson production is due to the Unruh effect near the event horizon of the black hole. Comparing these Higgs boson cross sections with Higgs boson cross sections in perturbative quantum chromodynamics, we find that micro black holes can be a source of Higgs production at the LHC. Finally, we calculate the effects of Higgs boson radiation due to mini black holes on the hadronic cross section at the LHC. We observe that as the order of perturbation theory increases this effect becomes systematically more significant because at higher orders there exist more channels for Higgs production and, in our calculations, Higgs decay into massive quark–antiquark pairs. At smaller masses, MBH < 2 TeV, the hadronic cross section at leading order is large while the cross sections at next-to-leading order and at next-to-next-to-leading order are rising at MBH ∼ 2 and 3 TeV, respectively, and exhibit a turn-over at moderate values of black hole mass.

Black hole thermodynamics

2021 ◽  
pp. 301-316
Author(s):  
Andrew M. Steane
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Hawking Radiation ◽  
Black Hole Thermodynamics ◽  
Unruh Effect ◽  
Area Theorem ◽  
Hawking Effect ◽  
Precise Calculation ◽  
Radiation Entropy ◽  
Penrose Process

The chapter presents the Penrose process, Hawking radiation, entropy and the laws of black hole thermodynamics. The Penrose process is derived and the area theorem is stated. A heuristic argument for the Hawking effect is given, emphasising a correct grasp of the concepts and the nature of the result. The Hawking effect and the Unruh effect are further discussed and linked together in a precise calculation. Evaporation of black holes is described. The information paradox is presented.

Black holes have ring of truth

Nature ◽  
2002 ◽  
Author(s):  
Philip Ball
Keyword(s):  
Black Holes
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