Brane worlds at the LHC: Branons and KK gravitons

Cembranos, J. A. R.; Delgado, Rafael L.; Dobado, Antonio

doi:10.1103/physrevd.88.075021

Cited by 28 publications

(17 citation statements)

References 63 publications

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“…P is the instantaneous probability for matter swapping between branes. Equation (5) shows that the neutron in the potential A amb undergoes Rabi-like oscillations between the branes. Note that the swapping probability is independent of the neutron spin direction [14].…”

Section: A Dynamics Of Swappingmentioning

confidence: 99%

“…Now, Eqs. (4) and (5) show the dependence of the swapping effect against A amb = A amb,+ − A amb,− , i.e. the difference between the vector potentials of the two braneworlds.…”

Section: B Ambient Magnetic Vector Potentialmentioning

confidence: 99%

“…As for most theories beyond the Standard Model of particle physics, new effects predicted by the braneworld hypothesis at both the high-energy and the precision frontiers can be investigated. Particle colliders, such as the Large Hadron Collider, attempt to excite new degrees of freedom at high energies [4,5] -like the Kaluza-Klein excitations of particles in the extra dimensions -whereas precision experiments at low energies attempt to find tiny signals induced by the new physics [6][7][8][9][10][11][12][13][14][15][16][17]. For instance, in the context of braneworld scenarios, the compactified extra dimensions would modify the inverse-square law of gravity at short distance.…”

Section: Introductionmentioning

confidence: 99%

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Probing the braneworld hypothesis with a neutron-shining-through-a-wall experiment

et al. 2015

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The possibility for our visible world to be a 3-brane embedded in a multidimensional bulk is at the heart of many theoretical edifices in high-energy physics. Probing the braneworld hypothesis is thus a major experimental challenge. Following recent theoretical works showing that matter swapping between braneworlds can occur, we propose a neutron-shining-through-a-wall experiment. We first show that an intense neutron source such as a nuclear reactor core can induce a hidden neutron flux in an adjacent hidden braneworld. We then describe how a low-background detector can detect neutrons arising from the hidden world and quantify the expected sensitivity to the swapping probability. As a proof of concept, a constraint is derived from previous experiments.

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Section: A Dynamics Of Swappingmentioning

confidence: 99%

“…Now, Eqs. (4) and (5) show the dependence of the swapping effect against A amb = A amb,+ − A amb,− , i.e. the difference between the vector potentials of the two braneworlds.…”

Section: B Ambient Magnetic Vector Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Probing the braneworld hypothesis with a neutron-shining-through-a-wall experiment

et al. 2015

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“…The particles associated with these fluctuations of the brane are scalar particles called branons [108][109][110][111]. Branons are stable and massive scalar dark matter candidates [112] and can be abundantly pair-produced in association with SM particles at the LHC.…”

Section: Extension To High-energy Regimementioning

confidence: 99%

Search for new physics in final states with low transverse energy photon and missing transverse energy in proton-proton collisions at $\sqrt{s} = 8$ TeV

Demiragli

2015

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Search for new physics in low-energy γ + E / T final state Designed, implemented, and commissioned the low-energy photon trigger which operated as part of the CMS "data parking"program. Led the full analysis of the 7.3 fb −1 collected by this trigger at √ s = 8 TeV, which included event selection, data driven and Monte Carlo based background estimations, sensitivity optimization, uncertainty estimation and statistical interpretation of the low photon p T and low missing transverse energy range. This is the first search at the LHC using the low-energy range of the γ + E / T final state.iv Search for new physics in high-energy γ + E / T final state Played a leading role in the analysis using full dataset collected at √ s = 8 TeV by independently performing several aspects of the analysis. The efforts included contributions to the event selection, sensitivity optimization, and uncertainty estimation. Most importantly, developed a new algorithm (MHT minimization) to reduce the contamination of events with mismeasured E / T . This algorithm led to 95% reduction of the dominant instrumental Standard Model background with > 99% signal efficiency.Search for new physics in γ γ final state Computed cross section limits using an alternative statistical technique. This required parametrization of the background and signal shapes and their uncertainty estimations, which allowed the limits to be computed for a larger number of signal mass hypotheses and the possibility to combine the results with resonance searches in different final states.Search for black holes Took part in devising the object selection, search window optimization, and estimation of various systematic uncertainties such as the uncertainty due to the choice of parton distribution functions. Service Work ActivitiesExotica Trigger Contact [2013][2014] Served as Exotica group trigger contact for the multijets, non-hadronic and lepton+jets working groups. Led the coordination of the trigger strategy for these groups for LHC Run 2. Designed and implemented the high energy single and double photon triggers in preparation for LHC Run 2. [2012][2013][2014] Developed software (new openHLT), which is widely used by trigger developers for optimization studies. Constructed the "half rate" menu which was used as the baseline for all Run 2 HLT algorithms within CMS. Contributed to large scale trigger rate studies such as pileup dependence both for the 7 TeV and 8 TeV data taking conditions. Using the data collected with the low-energy γ + / E T trigger, I conducted a search in an experimentally challenging phase space. The low-energy γ + / E T regime has never before been explored at the LHC. This phase space is particularly challenging compared to other searches because of the much larger background rate as well as the importance of understanding the systematic uncertainties, rather than the statistical uncertainty, which dominates in the high-energy regime. In this search, I have utilized multiple techniques based on control samples in data to describe various backgroun...

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“…Speculating further, one could mention that in the brane-world scenarios the branons appear as new relevant low-energy particles [49,50] whose couplings are suppressed by the brane tension [51]. They are therefore generically stable and weakly interacting, the features making them natural dark matter candidates [52] (for a recent review see [53]). Our mechanism of branon excitation by bulk matter should be explored in this context as well.…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

Perforation of a domain wall by a point mass

2014

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We investigate collision of a point particle and an infinitely thin planar domain wall interacting gravitationally within the linearized gravity in Minkowski space-time of arbitrary dimension. In this setting we are able to describe analytically the perforation of the wall by an impinging particle, showing that it is accompanied by excitation of the spherical shock branon wave propagating outwards with the speed of light. Formally, the shock wave is a free solution of the branon wave equation which has to be added to ensure the validity of the retarded solution at the perforation point. Physically, the domain wall gets excited due to the shake caused by an instantaneous change of sign of the repulsive gravitational force. This effect is shown to hold, in particular, in four space-time dimensions, being applicable to the problem of cosmological domain walls.

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Brane worlds at the LHC: Branons and KK gravitons

Cited by 28 publications

References 63 publications

Probing the braneworld hypothesis with a neutron-shining-through-a-wall experiment

Probing the braneworld hypothesis with a neutron-shining-through-a-wall experiment

Search for new physics in final states with low transverse energy photon and missing transverse energy in proton-proton collisions at $\sqrt{s} = 8$ TeV

Perforation of a domain wall by a point mass

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