P.B. 1029. BLINDERN, OSLO 3, NORWAY Theoretic Papers 1983 Jtr I

Total Page:16

File Type:pdf, Size:1020Kb

P.B. 1029. BLINDERN, OSLO 3, NORWAY Theoretic Papers 1983 Jtr I INIS-mf— 9692 THEORETIC PAPERS THE BLINDERN THEORETIC RESEARCH TEAM P.B. 1029. BLINDERN, OSLO 3, NORWAY Theoretic Papers 1983 JTr i COISERVATION OP BASIC MOHOPOLES IV DECAY PROCESSES by Vila Aall Bawioeili Inatitute of MatheBatica OniTersity of Oslo, Blindern* Norway ABSTRACT The conservation law of basic monopoles and other rules followed by these monopoles in the formation and decay processes of elementary particles are presented and discussed. A new interpretation of the distinction between rapid decay process (commonly ascribed to strong interactions) and slow decay processes (commonly ascribed to weak interactions) is proposed. - 2 - 1. Introduction In a preceding paper (Barricelli, 1983) the configurations identifying the magnetic monopoles shaping various elementary particles and their organization have been described. A list of the magnetic monopoles involved and their main properties is presented in table 1. The configurations of various elementary particles are listed in table 2. The configurations are identified by fitting the calculated masses, electric charges and spins of the various particles to the observed ones. All elementary particles and their magnetically charged components whose configurations are presented in tables 1 and 2 are interpreted as systems formed by various kinds of association 3 1 of the three basic monopoles B ,U1,L , and their anti-particles B3 ,U ,Lj. The purpose of this paper is to describe the way in which the basic monopoles of a decaying particle are distributed among the decay products and interpret some of the phenomena charac- teristic of these processes. A few conservation laws play a fundamental role in all decay processes. One of them is the conservation of the three basic monopoles. 2. The B,U,L conservation law According to this law the three basic monopoles are conserved in every decay process and every interaction process between elementary particles. This means that none of these monopoles can be created or destroyed except in the form of a "monopole-anti- 3 1 1 monopole pair", namely a B B3-pair, U U1-pair or L L1-pair. Decay processes not following this conservation law are apparently impossible in nature. An array of decay processes interpreted on the basis of the B,U,L conservation law is listed in the tables 3A,B,C. The interpretation is made as follows. One compares the B,U,L com- + 1 1 1 position of the decaying particle (for example y =(B3D L L )1 3 1 1 which is composed by the basic monopoles B3B UiL1L L , see table 2) with the composition of the decay products (for example 1 y 1 1 1 + l ve=(D L1)0, v =(B3U L L )0, e =(U1L )0 which all together con- 3 1 1 1 1 tain the basic monopoles B U1L1L1B3U L L U1L ). If there is a difference between the two sets of basic monopoles one may intro- Table 1 Description of magnetic monopoles. Kame Symbol Mass Electric Magnetic Strangeness Charm Spin Configuration M0»l charge charge H-l brief notation e-i Baric B3 9.000213 -1 -3 0 0 0 B 1- Light boson L1 1.000000 0 1 0 0 0 L u-quark U 1.000213 1 0 0 1/2 U l 1 d-quark 1.000000 0 1 0 0 1/2 (BUL)O s-quark (compact) 1.079326 0 1 -1 0 1/2 ((B0)0L)l Sl l- 8-quark (split) 1.068 0 1 l 0 1/2 — Tl c-quark (normal) C 1.572278 1 1 0 1 1/2 ((BS)2L)3 l c-quark (i-version) h 1,562069 1 1 0 1 1/2 ((BT)2L)3 The respective antiparticles B , L , U , D , S , T , C , I have opposite magnetic and electric charges, and opposite strangeness and charm. Lower indexes identify positive magnetic charges? upper indexes identify negative ones. Table 2 Configurations of elementary particles» B A R Y 0 N S Octett qf spin l/2 Decuplett of spin 3/2 Stran- Name and Configurations Name and Configurations geneas mass mass -3 fl(l672) ((BT)1TT)5 -2 5(1321) ((BS)1ET)4 ((BS)lUT)4 5(1530) ((BD)lTT)5 ((BU)lTT)5 -1 E(119O) ((BD)1DS)4 ((BD)1US)4 etc. Z (1385) ((BD)lDT)5 ((BD)lUT)5 etc. 0 n,p(938) ((BUD)4D)1 ((BUD)4U)l A(1232) ((BD)lDD)5 ((BD)lUD)5 etc. A(]115) ((BUD)4S)1 A (2260) ((BJD)4C)l Charmed Lambda baryon of spin l/2 MESONS Nonett of spin 0 Nonett of spin 1 1 0 i (958) ((BL}0UT)4 ? (TT)3 0 i (549) (ST)1 a) (783) (ST)2 ((BT)1(BU)O)1 Kt:!:(886) ((BT)l(BU)l)2 K°(498) ((BT)l(BD)O)l ((BU)1TL)1 K'°(892) ((BT)l(BD)l)2 0 n* (140) ((BU)O(BD)O)I P±(77O) (((BD)1B)1U)2 o 0 n (i35) ((BU)O(BU)O)I p°(77O) (((BU)1B)1U)2 Charmed triplett of spin 0 Charmed triplett of spin 1 0 D°(l863) D'°(2006) 4 0 D (l868) DI±(2OO9) ± ±1 F (2040) Ft:t(2140) Charm-anticharm of spin 0 Charm-anticharm of spin 1 Hc(2970) <l> (3095) (CC)2 L E P T 0 N S El.charge Strangeness Charm (1807) (B(BL)0C)3 ±1 0 ±1 S° (B(BL)0S)2 0 ±1 0 p* (106) (B(BL)0U)l or (BDLL)l ±1 0 o p° (B(BL)OD)1 or (BULL)l 0 0 0 vu(0) (BULL)O 0 0 0 e(0.51l) (UL)0 ±1 0 0 ve(0) (DL)0 0 0 0 - 3 - duce the necessary number of pair formations and/or annihilations in order to bring agreement .(if possible) between the two sets (in the above example the two pairs L1]^ and U1^ are missing in the decaying particle in order to complete the list of basic monopoles appearing in the decay products. These two pairs are recorded in the table as pair formations). A simple way to make sure that the two sets can be converted to one another by pair formations and/or annihilations is to remove in both sets every pair which can be found. If the two sets become identic after the removal they will obviously be reducible into each other by simple pair formations and/or annihilations (in the above example both of the two sets are reduced to the same set UjL1 after such pair removal). In many cases the notation FF is used in the tables 3A,B,C instead of BB,UU in a pair formation or annihilation. F2 is an abbreviation, sometimes designated as heavy fermion, which 1 stands for the (L-0) association (B3U )0. For example the s- quark configuration is often expressed by (FL)1 instead of ((BU)0L)1, the d-quark configuration is often expressed by (FL)0 instead of (BUL)O, and the n°-mesons configuration by (FF)1 instead of ((BU)0(BU)0)1. Likewise can a pair (L-0) associations such as e+e~ be used instead of the corresponding pairs of basic monopoles. If a decay process is possible, the B,U,L conservation law requires that the set of basic monopoles in the decaying particle can be converted into the set of basic monopoles in the decay products by a few pair formations and/or annihilations. But this does not have to be the case if the considered decay process is faulty or impossible. For example one of two faulty decay pro- cesses we have found in the literature (Barricelli, 1978) is the process K+-»n~e+e+, conflicting with the rule that two positively charged leptons can not be produced by a meson decay without pro- ducing an equal number of neutrinos or negatively charged leptons. If we compare the B,U,L composition of the decaying + 1 3 3 3 particle K =((B3T )1(B ^)0)1, which is B3B U1L1B U1, with 1 + 1 + 1 that of the decay products, n~=(F^L )1, e =(U1L )0, e =(U1L )0/ 1 1 1 1 1 namely B3U U L U1L U1L , we find that they are not reducible into one another by pair formations and/or annihilations. In fact, after removing all pairs, the first set becomes B'UiUiLi and the 1 1 1 second one becomes a quite different set, namely B3L L L . Table jA Decay of elewentaxy particles Particle and Mean life Pair, Hev associations ' Annihilations Decay products *of • Configuration (seo) foraed decays LEPTOHS 1 1 6 + II*. (B^L ! )! 2X10" LL.UU (A )0,(B uVlV.fU L^O Va-(DL)O, v -(BULL)O, e -(UL)O,(Y) «»* 3 i i i + 3 BB,LL e -(UL)O, Y, (Y) I©" + + ,-7 UU SB e -(UL)O, e -(UL)O, e"-(UL)O + 3 1 Ve-(DL)O, p -(BPL)l, vs-(DL)O 18 T*- (B (B3L )OC1)3 ? BB leaning 3 x j x x x f + - (B (B L )0((B S )2L )3)3 Lt,UU (B (B L )0D )O,(U1 )0, (B^U 1 I» )0 BB ve-(DL)0, e -(UL)0, v -(BU1L)O 18 UU BB 10 ? OU P+-(((BD)1B)1U)2, \T -(BULL)O 20 ? 1 l 1 1 1 ? 1 + UU,(nFF) ((BJT )l(B I71)0)lf(B30 L l )0,o(S f 2)l K -((BT)1(BU)O)1, vy-(BULL)O, 2 1 1 1 3 + UU,(nPP) (P U1L1)l,(B3U L L )O,(B B3)O,n( BB n -(PUL)l, vp-(BULL)O, nn» etc.
Recommended publications
  • Magnetic Monopole Searches See the Related Review(S): Magnetic Monopoles
    Citation: P.A. Zyla et al. (Particle Data Group), Prog. Theor. Exp. Phys. 2020, 083C01 (2020) Magnetic Monopole Searches See the related review(s): Magnetic Monopoles Monopole Production Cross Section — Accelerator Searches X-SECT MASS CHG ENERGY (cm2) (GeV) (g) (GeV) BEAM DOCUMENT ID TECN <2.5E−37 200–6000 1 13000 pp 1 ACHARYA 17 INDU <2E−37 200–6000 2 13000 pp 1 ACHARYA 17 INDU <4E−37 200–5000 3 13000 pp 1 ACHARYA 17 INDU <1.5E−36 400–4000 4 13000 pp 1 ACHARYA 17 INDU <7E−36 1000–3000 5 13000 pp 1 ACHARYA 17 INDU <5E−40 200–2500 0.5–2.0 8000 pp 2 AAD 16AB ATLS <2E−37 100–3500 1 8000 pp 3 ACHARYA 16 INDU <2E−37 100–3500 2 8000 pp 3 ACHARYA 16 INDU <6E−37 500–3000 3 8000 pp 3 ACHARYA 16 INDU <7E−36 1000–2000 4 8000 pp 3 ACHARYA 16 INDU <1.6E−38 200–1200 1 7000 pp 4 AAD 12CS ATLS <5E−38 45–102 1 206 e+ e− 5 ABBIENDI 08 OPAL <0.2E−36 200–700 1 1960 p p 6 ABULENCIA 06K CNTR < 2.E−36 1 300 e+ p 7,8 AKTAS 05A INDU < 0.2 E−36 2 300 e+ p 7,8 AKTAS 05A INDU < 0.09E−36 3 300 e+ p 7,8 AKTAS 05A INDU < 0.05E−36 ≥ 6 300 e+ p 7,8 AKTAS 05A INDU < 2.E−36 1 300 e+ p 7,9 AKTAS 05A INDU < 0.2E−36 2 300 e+ p 7,9 AKTAS 05A INDU < 0.07E−36 3 300 e+ p 7,9 AKTAS 05A INDU < 0.06E−36 ≥ 6 300 e+ p 7,9 AKTAS 05A INDU < 0.6E−36 >265 1 1800 p p 10 KALBFLEISCH 04 INDU < 0.2E−36 >355 2 1800 p p 10 KALBFLEISCH 04 INDU < 0.07E−36 >410 3 1800 p p 10 KALBFLEISCH 04 INDU < 0.2E−36 >375 6 1800 p p 10 KALBFLEISCH 04 INDU < 0.7E−36 >295 1 1800 p p 11,12 KALBFLEISCH 00 INDU < 7.8E−36 >260 2 1800 p p 11,12 KALBFLEISCH 00 INDU < 2.3E−36 >325 3 1800 p p 11,13 KALBFLEISCH 00 INDU < 0.11E−36 >420 6 1800 p p 11,13 KALBFLEISCH 00 INDU <0.65E−33 <3.3 ≥ 2 11A 197Au 14,15 HE 97 <1.90E−33 <8.1 ≥ 2 160A 208Pb 14,15 HE 97 <3.E−37 <45.0 1.0 88–94 e+ e− PINFOLD 93 PLAS <3.E−37 <41.6 2.0 88–94 e+ e− PINFOLD 93 PLAS <7.E−35 <44.9 0.2–1.0 89–93 e+ e− KINOSHITA 92 PLAS <2.E−34 <850 ≥ 0.5 1800 p p BERTANI 90 PLAS <1.2E−33 <800 ≥ 1 1800 p p PRICE 90 PLAS <1.E−37 <29 1 50–61 e+ e− KINOSHITA 89 PLAS <1.E−37 <18 2 50–61 e+ e− KINOSHITA 89 PLAS <1.E−38 <17 <1 35 e+ e− BRAUNSCH..
    [Show full text]
  • The Moedal Experiment at the LHC. Searching Beyond the Standard
    126 EPJ Web of Conferences , 02024 (2016) DOI: 10.1051/epjconf/201612602024 ICNFP 2015 The MoEDAL experiment at the LHC Searching beyond the standard model James L. Pinfold (for the MoEDAL Collaboration)1,a 1 University of Alberta, Physics Department, Edmonton, Alberta T6G 0V1, Canada Abstract. MoEDAL is a pioneering experiment designed to search for highly ionizing avatars of new physics such as magnetic monopoles or massive (pseudo-)stable charged particles. Its groundbreaking physics program defines a number of scenarios that yield potentially revolutionary insights into such foundational questions as: are there extra dimensions or new symmetries; what is the mechanism for the generation of mass; does magnetic charge exist; what is the nature of dark matter; and, how did the big-bang develop. MoEDAL’s purpose is to meet such far-reaching challenges at the frontier of the field. The innovative MoEDAL detector employs unconventional methodologies tuned to the prospect of discovery physics. The largely passive MoEDAL detector, deployed at Point 8 on the LHC ring, has a dual nature. First, it acts like a giant camera, comprised of nuclear track detectors - analyzed offline by ultra fast scanning microscopes - sensitive only to new physics. Second, it is uniquely able to trap the particle messengers of physics beyond the Standard Model for further study. MoEDAL’s radiation environment is monitored by a state-of-the-art real-time TimePix pixel detector array. A new MoEDAL sub-detector to extend MoEDAL’s reach to millicharged, minimally ionizing, particles (MMIPs) is under study Finally we shall describe the next step for MoEDAL called Cosmic MoEDAL, where we define a very large high altitude array to take the search for highly ionizing avatars of new physics to higher masses that are available from the cosmos.
    [Show full text]
  • Accelerator Search of the Magnetic Monopo
    Accelerator Based Magnetic Monopole Search Experiments (Overview) Vasily Dzhordzhadze, Praveen Chaudhari∗, Peter Cameron, Nicholas D’Imperio, Veljko Radeka, Pavel Rehak, Margareta Rehak, Sergio Rescia, Yannis Semertzidis, John Sondericker, and Peter Thieberger. Brookhaven National Laboratory ABSTRACT We present an overview of accelerator-based searches for magnetic monopoles and we show why such searches are important for modern particle physics. Possible properties of monopoles are reviewed as well as experimental methods used in the search for them at accelerators. Two types of experimental methods, direct and indirect are discussed. Finally, we describe proposed magnetic monopole search experiments at RHIC and LHC. Content 1. Magnetic Monopole characteristics 2. Experimental techniques 3. Monopole Search experiments 4. Magnetic Monopoles in virtual processes 5. Future experiments 6. Summary 1. Magnetic Monopole characteristics The magnetic monopole puzzle remains one of the fundamental and unsolved problems in physics. This problem has a along history. The military engineer Pierre de Maricourt [1] in1269 was breaking magnets, trying to separate their poles. P. Curie assumed the existence of single magnetic poles [2]. A real breakthrough happened after P. Dirac’s approach to the solution of the electron charge quantization problem [3]. Before Dirac, J. Maxwell postulated his fundamental laws of electrodynamics [4], which represent a complete description of all known classical electromagnetic phenomena. Together with the Lorenz force law and the Newton equations of motion, they describe all the classical dynamics of interacting charged particles and electromagnetic fields. In analogy to electrostatics one can add a magnetic charge, by introducing a magnetic charge density, thus magnetic fields are no longer due solely to the motion of an electric charge and in Maxwell equation a magnetic current will appear in analogy to the electric current.
    [Show full text]
  • Magnetic Monopoles
    Magnetic Monopoles Since Maxwell discovered the unified theory, Maxwell equations, of electric and magnetic forces, people have studied its implications. Maxwell conjectured the electromagnetic wave in his equations to be the light, based on the speed of electromagnetic wave being close to the speed of light. Since Herz and Heaviside, independently, have written the current form of Maxwell’s equations, 1905 Poincare and Einstein independently found the Lorentz transformation which is the property of Maxwell equation. The study of cathode ray has led to the discovery of electrons. The electron orbits are bending around when a magnet was brought near it. By imagining the motion of electron near a tip of a very long solenoid, Poincare introduced a magnetic monopole around which the magnetic field comes out radially. B = gr/r3 1. Consider the motion of a charged particle with equation of motion, m d2r/dt2 = e v x B Find the conserved energy E and the explicit form of the conserved angular momentum J=mr x dr/dt+.… 2. Find the orbit of the charged particle. 3. Consider the motion of two magnetic monopoles appearing in the 4-dim field theory. Magnetic monopoles are characterized by their positions and internal phase angle. The Lagrangian for the relative position r and phase ψ is given as below. where ψ ~ ψ+2π and ∇xw(r)= -r/r3 , and r0 and a are constant positive parameters.. µ r r 1 1 a2 L = 1+ 0 r˙ 2 + r2 1+ 0 − (ψ˙ + w(r) r˙)2 + 0 2 r0 2 r r · 2µr0 1+ r Calling the conserved charge q under the shift symmetry of ψ and the conjugate momentum π of the coordinate r, find the expression for the conserved energy and angular momentum J.
    [Show full text]
  • SL Paper 3 Markscheme
    theonlinephysicstutor.com SL Paper 3 This question is about leptons and mesons. Leptons are a class of elementary particles and each lepton has its own antiparticle. State what is meant by an Unlike leptons, the meson is not an elementary particle. State the a. (i) elementary particle. [2] (ii) antiparticle of a lepton. b. The electron is a lepton and its antiparticle is the positron. The following reaction can take place between an electron and positron. [3] Sketch the Feynman diagram for this reaction and identify on your diagram any virtual particles. c. (i) quark structure of the meson. [2] (ii) reason why the following reaction does not occur. Markscheme a. (i) a particle that cannot be made from any smaller constituents/particles; (ii) has the same rest mass (and spin) as the lepton but opposite charge (and opposite lepton number); b. Award [1] for each correct section of the diagram. correct direction ; correct direction and ; virtual electron/positron; Accept all three time orderings. @TOPhysicsTutor facebook.com/TheOnlinePhysicsTutor c. (i) / up and anti-down; theonlinephysicstutor.com (ii) baryon number is not conserved / quarks are not conserved; Examiners report a. Part (a) was often correct. b. The Feynman diagrams rarely showed the virtual particle. c. A significant number of candidates had a good understanding of quark structure. This question is about fundamental interactions. The kaon decays into an antimuon and a neutrino as shown by the Feynman diagram. b.i.Explain why the virtual particle in this Feynman diagram must be a weak interaction exchange particle. [2] c. A student claims that the is produced in neutron decays according to the reaction .
    [Show full text]
  • 117. Magnetic Monopoles
    1 117. Magnetic Monopoles 117. Magnetic Monopoles Revised August 2019 by D. Milstead (Stockholm U.) and E.J. Weinberg (Columbia U.). 117.1 Theory of magnetic monopoles The symmetry between electric and magnetic fields in the source-free Maxwell’s equations naturally suggests that electric charges might have magnetic counterparts, known as magnetic monopoles. Although the greatest interest has been in the supermassive monopoles that are a firm prediction of all grand unified theories, one cannot exclude the possibility of lighter monopoles. In either case, the magnetic charge is constrained by a quantization condition first found by Dirac [1]. Consider a monopole with magnetic charge QM and a Coulomb magnetic field Q ˆr B = M . (117.1) 4π r2 Any vector potential A whose curl is equal to B must be singular along some line running from the origin to spatial infinity. This Dirac string singularity could potentially be detected through the extra phase that the wavefunction of a particle with electric charge QE would acquire if it moved along a loop encircling the string. For the string to be unobservable, this phase must be a multiple of 2π. Requiring that this be the case for any pair of electric and magnetic charges gives min min the condition that all charges be integer multiples of minimum charges QE and QM obeying min min QE QM = 2π . (117.2) (For monopoles which also carry an electric charge, called dyons [2], the quantization conditions on their electric charges can be modified. However, the constraints on magnetic charges, as well as those on all purely electric particles, will be unchanged.) Another way to understand this result is to note that the conserved orbital angular momentum of a point electric charge moving in the field of a magnetic monopole has an additional component, with L = mr × v − 4πQEQM ˆr (117.3) Requiring the radial component of L to be quantized in half-integer units yields Eq.
    [Show full text]
  • Charmed Baryon Spectroscopy in a Quark Model
    Charmed baryon spectroscopy in a quark model Tokyo tech, RCNP A,RIKEN B, Tetsuya Yoshida,Makoto Oka , Atsushi HosakaA , Emiko HiyamaB, Ktsunori SadatoA Contents Ø Motivation Ø Formalism Ø Result ü Spectrum of single charmed baryon ü λ-mode and ρ-mode Ø Summary Motivation Many unknown states in heavy baryons ü We know the baryon spectra in light sector but still do not know heavy baryon spectra well. ü Constituent quark model is successful in describing Many unknown state baryon spectra and we can predict unknown states of heavy baryons by using the model. Σ Difference from light sector ΛC C ü λ-mode state and ρ-mode state split in heavy quark sector ü Because of HQS, we expect that there is spin-partner Motivation light quark sector vs heavy quark sector What is the role of diquark? How is it in How do spectrum and the heavy quark limit? wave function change? heavy quark limit m m q Q ∞ λ , ρ mode ü we can see how the spectrum and wave-funcon change ü Is charm sector near from heavy quark limit (or far) ? Hamiltonian ij ij ij Confinement H = ∑Ki +∑(Vconf + Hhyp +VLS ) +Cqqq i i< j " % " % 2 π 1 1 brij 2α (m p 2m ) $ ' (r) $ Coul ' Spin-Spin = ∑ i + i i + αcon ∑$ 2 + 2 'δ +∑$ − ' i 3 i< j # mi mj & i< j # 2 3rij & ) # &, 2αcon 8π 3 2αten 1 3Si ⋅ rijS j ⋅ rij + + Si ⋅ S jδ (rij )+ % − Si ⋅ S j (. ∑ 3 % 2 ( Coulomb i< j *+3m i mj 3 3mimj rij $ rij '-. the cause of mass spliPng Tensor 1 2 2 4 l s C +∑αSO 2 3 (ξi +ξ j + ξiξ j ) ij ⋅ ij + qqq i< j 3mq rij Spin orbit ü We determined the parameter that the result of the Strange baryon will agree with experimental results .
    [Show full text]
  • Continuous Gravitational Waves and Magnetic Monopole Signatures from Single Neutron Stars
    PHYSICAL REVIEW D 101, 075028 (2020) Continuous gravitational waves and magnetic monopole signatures from single neutron stars † ‡ P. V. S. Pavan Chandra,1,* Mrunal Korwar,2, and Arun M. Thalapillil 1, 1Indian Institute of Science Education and Research, Homi Bhabha Road, Pashan, Pune 411008, India 2Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA (Received 2 December 2019; accepted 1 April 2020; published 15 April 2020) Future observations of continuous gravitational waves from single neutron stars, apart from their monumental astrophysical significance, could also shed light on fundamental physics and exotic particle states. One such avenue is based on the fact that magnetic fields cause deformations of a neutron star, which results in a magnetic-field-induced quadrupole ellipticity. If the magnetic and rotation axes are different, this quadrupole ellipticity may generate continuous gravitational waves which may last decades, and may be observable in current or future detectors. Light, milli-magnetic monopoles, if they exist, could be pair-produced nonperturbatively in the extreme magnetic fields of neutron stars, such as magnetars. This nonperturbative production furnishes a new, direct dissipative mechanism for the neutron star magnetic fields. Through their consequent effect on the magnetic-field-induced quadrupole ellipticity, they may then potentially leave imprints in the early stage continuous gravitational wave emissions. We speculate on this possibility in the present study, by considering some of the relevant physics and taking a very simplified toy model of a magnetar as the prototypical system. Preliminary indications are that new- born millisecond magnetars could be promising candidates to look for such imprints.
    [Show full text]
  • Measurement of Neutrino's Magnetic Monopole Charge, Vacuum Energy and Cause of Quantum Mechanical Uncertainty
    Measurement of Neutrino's Magnetic Monopole Charge, Vacuum Energy and Cause of Quantum Mechanical Uncertainty Eue Jin Jeong ( [email protected] ) Tachyonics Research Institute Dennis Edmondson Columbia College, Marysville, Washington Research Article Keywords: fundamental physics, elementary particle physics, electricity and magnetism, experimental physics Posted Date: October 9th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-88897/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Measurement of Neutrino's Magnetic Monopole Charge, Vacuum Energy and Cause of Quantum Mechanical Uncertainty Abstract Charge conservation in the theory of elementary particle physics is one of the best- established principles in physics. As such, if there are magnetic monopoles in the universe, the magnetic charge will most likely be a conserved quantity like electric charges. If neutrinos are magnetic monopoles, as physicists have speculated the possibility, then neutrons must also have a magnetic monopole charge, and the Earth should show signs of having a magnetic monopole charge on a macroscopic scale. To test this hypothesis, experiments were performed to detect the magnetic monopole's effect near the equator by measuring the Earth's radial magnetic force using two balanced high strength neodymium rods magnets that successfully identified the magnetic monopole charge. From this observation, we conclude that at least the electron neutrino which is a byproduct of weak decay of the neutron must be magnetic monopole. We present mathematical expressions for the vacuum electric field based on the findings and discuss various physical consequences related to the symmetry in Maxwell's equations, the origin of quantum mechanical uncertainty, the medium for electromagnetic wave propagation in space, and the logistic distribution of the massive number of magnetic monopoles in the universe.
    [Show full text]
  • Ask a Scientist Answers
    Ask a scientist answers. GN I quote the beginning of the question, then my answer: Q11: “Since beta decay is when …” A11: Good question. The weak force is responsible for changing one quark into another, in this case a d-quark into a u-quark. Because the electric charge must conserved one needs to emit a negative charge (the neutron is neutral, the proton is +1, so you need a -1- type particle). In principle there could be other -1 particles emitted (say a mu-) but nature is lazy and will go with the easiest to come by (as in the “lowest possible energy” needed to do the job) particle, an electron. Of course, because we have an electron in the final state now we also need a matching anti-neutrino, as the lepton number (quantum number that counts the electrons, neutrinos, and their kind – remember the slide with the felines in my presentation) needs to be conserved as well. Now, going back to your original question “…where they come from?” the energy of the original nucleus. Remember E=m * c^2. That is a recipe for creating particles (mass) if one has enough initial energy. In this case in order for the beta decay to occur (naturally) you need the starting nucleus to have a higher sum of the energies of the daughter nucleus one gets after decay and the energies of the electron and antineutrino combined. That energy difference can then be “spent” in creating the mass of the electron and antineutrino (and giving them, and the daughter nucleus some kinetic energy, assuming there are energy leftovers).
    [Show full text]
  • Reconstruction Study of the S Particle Dark Matter Candidate at ALICE
    Department of Physics and Astronomy University of Heidelberg Reconstruction study of the S particle dark matter candidate at ALICE Master Thesis in Physics submitted by Fabio Leonardo Schlichtmann born in Heilbronn (Germany) March 2021 Abstract: This thesis deals with the sexaquark S, a proposed particle with uuddss quark content which might be strongly bound and is considered to be a reasonable dark matter can- didate. The S is supposed to be produced in Pb-Pb nuclear collisions and could interact with detector material, resulting in characteristic final states. A suitable way to observe final states is using the ALICE experiment which is capable of detecting charged and neutral particles and doing particle identification (PID). In this thesis the full reconstruction chain for the S particle is described, in particular the purity of particle identification for various kinds of particle species is studied in dependence of topological restrictions. Moreover, nuclear interactions in the detector material are considered with regard to their spatial distribution. Conceivable reactions channels of the S are discussed, a phase space simulation is done and the order of magnitude of possibly detectable S candidates is estimated. With regard to the reaction channels, various PID and topology cuts were defined and varied in order to find an S candidate. In total 2:17 · 108 Pb-Pb events from two different beam times were analyzed. The resulting S particle candidates were studied with regard to PID and methods of background estimation were applied. In conclusion we found in the channel S + p ! ¯p+ K+ + K0 + π+ a signal with a significance of up to 2.8, depending on the cuts, while no sizable signal was found in the other studied channels.
    [Show full text]
  • Searches for Magnetic Monopoles with Icecube
    EPJ Web of Conferences 168, 04010 (2018) https://doi.org/10.1051/epjconf/201816804010 Joint International Conference of ICGAC-XIII and IK-15 on Gravitation, Astrophysics and Cosmology Searches for magnetic monopoles with IceCube Anna Pollmann1, for the IceCube Collaboration 1Dept. of Physics, University of Wuppertal, 42119 Wuppertal, Germany Abstract. Particles that carry a magnetic monopole charge are proposed by various the- ories which go beyond the Standard Model of particle physics. The expected mass of magnetic monopoles varies depending on the theory describing its origin, generally the monopole mass far exceeds those which can be created at accelerators. Magnetic monopoles gain kinetic energy in large scale galactic magnetic fields and, depending on their mass, can obtain relativistic velocities. IceCube is a high energy neutrino detector using the clear ice at the South Pole as a detec- tion medium. As monopoles pass through this ice they produce optical light by a variety of mechanisms. With increasing velocity, they produce light by catalysis of baryon de- cay, luminescence in the ice associated with electronic excitations, indirect and direct Cherenkov light from the monopole track, and Cherenkov light from cascades induced by pair creation and photonuclear reactions. By searching for this light, current best lim- its for the monopole flux over a broad range of velocities was achieved using the IceCube detector. A review of these magnetic monopole searches is presented. 1 Introduction The existence of magnetic monopoles, particles carrying a single magnetic charge, is motivated by var- ious theories which extend the Standard Model of particles, such as Grand Unified Theories (GUTs), String theory, Kaluza-Klein, and M-Theory [1].
    [Show full text]