Search for magnetic monopoles with the MoEDAL prototype trapping detector in 8 TeV proton-proton collisions at the LHC

Acharya, B. S.; Alexandre, Jean; Bendtz, K.; Beneš, P.; Bernabéu, J.; Campbell, M.; Cecchini, S.; Chwastowski, J. J.; Chatterjee, A.; Montigny, M. de; Derendarz, D.; Roeck, A. De; Ellis, John; Fairbairn, Malcolm; Felea, D.; Frank, Mariana; Frekers, D.; García, C.; Giacomelli, G.; Haşegan, D.; Kalliokoski, Matti; Katre, A.; Kim, D. W.; King, M.; Kinoshita, K.; Lacarrère, D.; Lee, S. C.; Leroy, C.; Lionti, A. L.; Margiotta, A.; Mauri, N.; Mavromatos, Nick E.; Mermod, P.; Milstead, D. A.; Mitsou, V. A.; Orava, R.; Parker, B.; Pasqualini, L.; Patrizii, L.; Păvălaş, G. E.; Pinfold, J. L.; Platkevič, Michal; Popa, V.; Pozzato, M.; Pospı́šil, S.; Rajantie, Arttu; Sahnoun, Z.; Sakellariadou, Mairi; Sarkar, Sarben; Semenoff, Gordon W.; Sirri, G.; Sliwa, K.; Soluk, R.; Spurio, M.; Srivastava, Y. N.; Staszewski, R.; Suk, M.; Swain, J.; Tenti, M.; Togo, V.; Trzebiński, M.; Tuszyński, Jack A.; Vento, V.; Vives, O.; Vykydal, Z.; Whyntie, T.; Widom, A.; Willems, Guido Alexander; Yoon, Ji Hye

doi:10.1007/jhep08(2016)067

Cited by 69 publications

(93 citation statements)

References 66 publications

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“…MoEDAL is a dedicated experiment searching for MMs produced in high-energy collisions at the LHC using stacks of nucleartrack detectors and a trapping detector. Recently, limits on MM production cross sections have been reported both for the 8 TeV and 13 TeV LHC runs [9,10].…”

Section: Jhep07(2017)054mentioning

confidence: 99%

Search for relativistic magnetic monopoles with five years of the ANTARES detector data

Albert

André

Anghinolfi

et al. 2017

J. High Energ. Phys.

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A search for magnetic monopoles using five years of data recorded with the ANTARES neutrino telescope from January 2008 to December 2012 with a total live time of 1121 days is presented. The analysis is carried out in the range β > 0.6 of magnetic monopole velocities using a strategy based on run-by-run Monte Carlo simulations. No signal above the background expectation from atmospheric muons and atmospheric neutrinos is observed, and upper limits are set on the magnetic monopole flux ranging from 5.7 × 10 −16 to 1.5 × 10 −18 cm −2 · s −1 · sr −1 .

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Section: Jhep07(2017)054mentioning

confidence: 99%

Search for relativistic magnetic monopoles with five years of the ANTARES detector data

Albert

André

Anghinolfi

et al. 2017

J. High Energ. Phys.

Self Cite

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“…For model-dependent and model-independent interpretations of the results, magnetic monopoles were simulated using Drell-Yan (DY) and Single-monopole production [29]. …”

Section: Monopole Simulationmentioning

confidence: 99%

“…MoEDAL simulation preliminary Figure 5. The kinematic distributions of spin-1/2 pair-produced monopoles considered for model-dependent results [29].…”

Section: Icnfp 2015mentioning

confidence: 99%

“…The VELO region within the acceptance of the LHCb detector is designed Figure 6. The acceptance of the MoEDAL test array in the kinetic energy and θ parameter space for monopole charges from 1.0 -6.0 gD [29].…”

Section: Systematicsmentioning

confidence: 99%

“…The uncertainty on the material description has a direct consequence on the acceptance maps, that affects both model-independent and model-dependent results. At the time of writing these proceedings, the determination of these systematic uncertainties is ongoing and will be documented in future publications [29]. …”

Section: Systematicsmentioning

confidence: 99%

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Magnetic monopole search with the MoEDAL test trapping detector

Katre

2016

EPJ Web Conf.

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Abstract. MoEDAL is designed to search for monopoles produced in high-energy Large Hadron Collider (LHC) collisions, based on two complementary techniques: nucleartrack detectors for high-ionisation signatures and other highly ionising avatars of new physics, and trapping volumes for direct magnetic charge measurements with a superconducting magnetometer. The MoEDAL test trapping detector array deployed in 2012, consisting of over 600 aluminium samples, was analysed and found to be consistent with zero trapped magnetic charge. Stopping acceptances are obtained from a simulation of monopole propagation in matter for a range of charges and masses, allowing to set modelindependent and model-dependent limits on monopole production cross sections. Multiples of the fundamental Dirac magnetic charge are probed for the first time at the LHC. IntroductionMagnetic monopoles were first postulated by Dirac in 1931, who showed that with their existence, electric charge quantisation could be explained as a natural consequence of angular momentum quantisation [1]. Their introduction would also add symmetry to Maxwell's equations of electromagnetism. 't Hooft and Polyakov, in 1974, independently demonstrated that a Grand Unified Theory (GUT) scheme possesses a monopole solution when a U(1) subgroup of electromagnetism that is embedded into a larger gauge group is spontaneously broken by the Higgs mechanism [2,3]. Monopole solutions have been proposed to arise within the electroweak theory itself [4], which relies on spontaneous gauge symmetry breaking. The Cho-Maison electroweak monopole would have a mass of the order of several TeV [5,6] and is possibly within the range of the Large Hadron Collider (LHC). With the abundance of monopole theories and no definite estimate on its mass, the search for free magnetic charges in nature is compelling.Dirac proposed that the monopoles should carry a magnetic charge g equal to the multiple of a fundamental unit of magnetic charge referred to as the Dirac charge g D : g = n.g D , where g D is equivalent to 68.5 times the charge of an electron. The minimum value of the quantisation number n varies between different theories. According to Dirac, n = 1, 2, 3.., while according to Schwinger, as well as, Cho and Maison, n = 2, 4, 6.. [4,7], and n = 3, 6, 9.. or n = 6, 12, 18.. if one considers the elementary charge to be carried by the down quark. As a result of the high value of the Dirac magnetic charge, a high velocity monopole is expected to suffer energy losses in matter over ≈4700 times higher than a muon [8][9][10]. Thus, in general monopoles in nature will manifest themselves as a

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Monopole and instanton effects in QCD

Hasegawa

2020

J. High Energ. Phys.

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We aim to show the effects of the magnetic monopoles and instantons in quantum chromodynamics (QCD) on observables; therefore, we introduce a monopole and anti-monopole pair in the QCD vacuum of a quenched SU(3) by applying the monopole creation operator to the vacuum. We calculate the eigenvalues and eigenvectors of the overlap Dirac operator that preserves the exact chiral symmetry in lattice gauge theory using these QCD vacua. We then investigate the effects of magnetic monopoles and instantons. First, we confirm the monopole effects as follows: (i) the monopole creation operator makes the monopoles and anti-monopoles in the QCD vacuum. (ii) A monopole and anti-monopole pair creates an instanton or anti-instanton without changing the structure of the QCD vacuum. (iii) The monopole and anti-monopole pairs change only the scale of the spectrum distribution without affecting the spectra of the Dirac operator by comparing the spectra with random matrix theory. Next, we find the instanton effects by increasing the number density of the instantons and anti-instantons as follows: (iv) the decay constants of the pseudoscalar increase. (v) The values of the chiral condensate, which are defined as negative numbers, decrease. (vi) The light quarks and the pseudoscalar mesons become heavy. The catalytic effect on the charged pion is estimated using the numerical results of the pion decay constant and the pion mass. (vii) The decay width of the charged pion becomes wider than the experimental result, and the lifetime of the charged pion becomes shorter than the experimental result. These are the effects of the monopoles and instantons in QCD.

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Search for magnetic monopoles with the MoEDAL prototype trapping detector in 8 TeV proton-proton collisions at the LHC

Cited by 69 publications

References 66 publications

Search for relativistic magnetic monopoles with five years of the ANTARES detector data

Search for relativistic magnetic monopoles with five years of the ANTARES detector data

Magnetic monopole search with the MoEDAL test trapping detector

Monopole and instanton effects in QCD

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