BlackMax: A black-hole event generator with rotation, recoil, split branes, and brane tension

Dai, De-Chang; Starkman, Glenn D.; Stojković, Dejan; İşsever, Ç.; Rizvi, E.; Tseng, J.

doi:10.1103/physrevd.77.076007

Cited by 139 publications

(134 citation statements)

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“…A model for quantum black holes (QBH) that decay to two jets is simulated using both the BLACKMAX [68] and the QBH [69] generators, to produce a simple two-body final-state scenario of quantum gravitational effects at the fundamental Planck scale M D , with n ¼ 6 extra spatial dimensions in the context of the ADD model [70]. In this model, the Planck scale is set equal to the threshold mass for the quantum black hole production m th .…”

Section: Simulation Of Hypothetical New Phenomenamentioning

confidence: 99%

Search for new phenomena in the dijet mass distribution usingppcollision data ats=8 TeVwith the ATLAS detector

et al. 2015

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Dijet events produced in LHC proton-proton collisions at a center-of-mass energy ffiffi ffi s p ¼ 8 TeV are studied with the ATLAS detector using the full 2012 data set, with an integrated luminosity of 20.3 fb −1 . Dijet masses up to about 4.5 TeV are probed. No resonancelike features are observed in the dijet mass spectrum. Limits on the cross section times acceptance are set at the 95% credibility level for various hypotheses of new phenomena in terms of mass or energy scale, as appropriate. This analysis excludes excited quarks with a mass below 4.06 TeV, color-octet scalars with a mass below 2.70 TeV, heavy W 0 bosons with a mass below 2.45 TeV, chiral W Ã bosons with a mass below 1.75 TeV, and quantum black holes with six extra space-time dimensions with threshold mass below 5.66 TeV.

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Section: Simulation Of Hypothetical New Phenomenamentioning

confidence: 99%

Search for new phenomena in the dijet mass distribution usingppcollision data ats=8 TeVwith the ATLAS detector

et al. 2015

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“…A model for quantum black holes, QBH, that decay to two jets is simulated using BlackMax [60] with the CT10 PDF to produce a simple two-body final state scenario of quantum gravitational effects at the reduced Planck Scale M D , with n = 6 extra spatial dimensions. The QBH model is used as a benchmark to represent any quantum gravitational effect that produces events containing dijets.…”

Section: Simulation Of Hypothetical New Phenomenamentioning

confidence: 99%

ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at $ \sqrt{s}=7 $TeV

Buanes¹,

Burgess²,

Eigen³

et al. 2013

J. High Energ. Phys.

103

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Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy √ s = 7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated luminosity of 4.8 fb −1 . Dijet masses up to ∼ 4.0 TeV have been probed. No resonance-like features have been observed in the dijet mass spectrum, and all angular distributions are consistent with the predictions of QCD. Exclusion limits on six hypotheses of new phenomena have been set at 95% CL in terms of mass or energy scale, as appropriate. These hypotheses include excited quarks below 2.83 TeV, colour octet scalars below 1.86 TeV, heavy W bosons below 1.68 TeV, string resonances below 3.61 TeV, quantum black holes with six extra space-time dimensions for quantum gravity scales below 4.11 TeV, and quark contact interactions below a compositeness scale of 7.6 TeV in a destructive interference scenario. The ATLAS collaboration 30At the CERN Large Hadron Collider (LHC), collisions with the largest momentum transfer typically result in final states with two jets of particles with high transverse momentum (p T ). The study of these events tests the Standard Model (SM) at the highest energies accessible at the LHC. At these energies, new particles could be produced [1,2], new interactions between particles could manifest themselves [3-6], or interactions resulting from the unification of SM with gravity could appear in the TeV range [7][8][9][10][11][12]. These collisions also probe the structure of the fundamental constituents of matter at the smallest distance scales allowing, for example, an experimental test of the size of quarks. The models for new phenomena (NP) tested in the current studies are described in section 9. The two jets emerging from the collision may be reconstructed to determine the twojet (dijet) invariant mass, m jj , and the scattering angular distribution with respect to the colliding beams of protons. The dominant Quantum Chromodynamics (QCD) interactions for this high-p T scattering regime are t-channel processes, leading to angular distributions that peak at small scattering angles. Different classes of new phenomena are expected to modify dijet mass distribution and the dijet angular distributions as a function of m jj , creating either a deviation from the QCD prediction above some threshold or an excess of events localised in mass (often referred to as a "bump" or "resonance"). Most models predict that the angular distribution of the NP signal would be more isotropic than that of QCD.Results from previous studies of dijet mass and angular distributions [13][14][15][16][17][18][19][20][21][22][23] were consistent with QCD predictions. The study reported in this paper is based on pp collisions at a centre-of-mass (CM) energy of 7 TeV produced at the LHC and measured by the ATLAS detector. The analysed data set corresponds to an integrated luminosity of 4.8 fb −1 collected in 2011 [24,25], a substantial increase over previously published ATLAS dijet analyses [22, 23].A d...

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“…The canonical Monte Carlo generators for the production of black hole signals are Charybdis 2.104 [58] and Blackmax 2.2.0 [59,60]. Both programs are able to simulate a range of rotating and non-rotating black hole and string ball states, exploring the theoretical modelling uncertainties discussed in section 1.…”

Section: Jhep08(2014)103mentioning

confidence: 99%

“…The modelling of the remnant phase can have large effects on the event multiplicity, and hence the experimental signature. Blackmax uses a final-burst remnant model, which gives highmultiplicity remnant states [59]; Charybdis benchmarks are generated with both low--5 - and high-multiplicity remnant decays, corresponding to fixed two-body decay, and variable decay with a mean of four particles, respectively. The high-multiplicity options of both generators produce similar distributions of particle multiplicities and p T .…”

Section: Jhep08(2014)103mentioning

confidence: 99%

“…[52][53][54]. Diboson (W W , W Z, ZZ) production is simulated with Herwig 6.5.20 using the CTEQ6L1 PDF set and the AU2 tune [55], normalised to the NLO prediction of MCFM 6.2 [56,57].The canonical Monte Carlo generators for the production of black hole signals are Charybdis 2.104 [58] and Blackmax 2.2.0 [59,60]. Both programs are able to simulate a range of rotating and non-rotating black hole and string ball states, exploring the theoretical modelling uncertainties discussed in section 1.…”

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confidence: 99%

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Search for microscopic black holes and string balls in final states with leptons and jets with the ATLAS detector at s $$ \sqrt{s} $$ = 8 TeV

Aad¹,

Abbott²,

Abdallah³

et al. 2014

J. High Energ. Phys.

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A search for an excess of events with multiple high transverse momentum objects including charged leptons and jets is presented, using 20.3 fb −1 of proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2012 at a centre-of-mass energy of √ s = 8 TeV. No excess of events beyond Standard Model expectations is observed. Using extra-dimensional models for black hole and string ball production and decay, exclusion contours are determined as a function of the mass threshold for production and the fundamental gravity scale for two, four and six extra dimensions. For six extra dimensions, mass thresholds of 4.8-6.2 TeV are excluded at 95% confidence level, depending on the fundamental gravity scale and model assumptions. Upper limits on the fiducial cross-sections for non-Standard Model production of these final states are set. 6 Event selection 8 7 Background estimation 9 7.1 Prompt background estimation from control regions 9 7.2 Backgrounds from misidentified objects and non-prompt leptons 13 7.3 Background smoothing with fits 148 Systematic uncertainties 159 Results and interpretation 17 Summary 25The ATLAS collaboration 32 IntroductionA long-standing problem in particle physics is the very large difference between two apparently fundamental energy scales: the electroweak scale at O(0.1 TeV) and the gravitational (Planck) scale M Pl = O(10 16 TeV). Models postulating extra spatial dimensions into which the gravitational field propagates attempt to address this hierarchy problem [1][2][3][4]. In most of these models, the Standard Model (SM) fields are constrained to the one time and three spatial dimensions of our universe, whilst the gravitons also propagate into the n "bulk" extra dimensions. In these models, the fundamental gravitational scale in the full (n + 4) space-time dimensions, M D , is dramatically lower than M Pl , and represents an effective scale appropriate for probes of the gravitational interactions at low energies. A value of M D in the TeV range would allow for the production of strong gravitational states such as microscopic black holes at energies accessible at the Large Hadron Collider (LHC) [5][6][7]. Two well-motivated extra-dimensional models are those with large flat extra dimensions -1 - JHEP08(2014)103(ADD models [2,3]) and those with small, usually warped, extra dimensions (RS models [4]). This analysis considers ADD models, for which the n = 1 case is ruled out and the n = 2 case is disfavoured by current astrophysical and tabletop experiments [8]. Thus, benchmark models with two, four and six additional spatial dimensions are considered.Estimates of the black hole production cross-sections invoke semiclassical approximations, the validity of which require the production centre-of-mass energy to be significantly above M D . This motivates the introduction of a production mass threshold M th , well above M D . In the black hole formation stage, some energy is expected to be lost to gravitational or SM radiation. This has recently been calcu...

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BlackMax: A black-hole event generator with rotation, recoil, split branes, and brane tension

Cited by 139 publications

References 137 publications

Search for new phenomena in the dijet mass distribution usingppcollision data ats=8 TeVwith the ATLAS detector

Search for new phenomena in the dijet mass distribution usingppcollision data ats=8 TeVwith the ATLAS detector

ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at $ \sqrt{s}=7 $TeV

Search for microscopic black holes and string balls in final states with leptons and jets with the ATLAS detector at s $$ \sqrt{s} $$ = 8 TeV

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