Chapter 2. Figures with Closely Packed Elements
The masses of elementary particles vary by more than five orders of magnitude. Let's try to find simple principles that can be used to derive numerical expressions with such variation.
Crystals are an example of diversity arising from simplicity. Their diversity is explained by simple ideas that date back to antiquity. These include the idea of identical atoms, the idea of minimal surface area (the idea of a sphere), and the postulate that nature abhors a vacuum. Atoms in crystals are packed so as to minimize the voids between them. This is achieved through regular crystal packing. But in the world of crystals, in the world of inert nature, pentagons are very rare, while in living nature they abound. For example, sea urchins and starfish, or the blossom of an apple tree. And inside each apple, the seeds are arranged in the shape of a five-pointed star.
In crystals, voids tend to a minimum, and in living tissues, there is none at all. Living cells are not spheres, but polyhedra, tightly pressed together without voids. Cells grow, divide, grow, divide again, and densely fill the space without voids.
Living nature, in packing cells, uses the principle of packing soap foam. A single soap bubble is round due to surface tension. At the same time, it has a minimal surface area. When these bubbles merge, striving for a minimal surface area, they turn into polyhedra.
Figure 2.
The cells in a watermelon are packed like bubbles in soap foam.
Figure 2.
The cells in a watermelon are packed like bubbles in soap foam.
Soap foams are gas and a little water. But these mobile substances form a solid due to surface tension – soap foams retain their shape. Drops of oil floating in a watery liquid of the same density are round. But when they combine, these droplets also form polyhedrons, separated by thin films. And this "foam" also retains its shape. Mayonnaise is composed of liquids, but it is solid.
Soap foams contain only films (bubble faces), edges, and vertices. Soap bubbles are packed according to Plateau's laws:
Within each face, the surface curvature is constant.
Faces intersect in groups of three at one edge. All faces pull equally in their direction, and equilibrium is achieved when the angles between faces are equal and equal to 120°.
Edges always intersect at a vertex in groups of four at the same angle of 109.47° (the tetrahedral angle). In this case, a balance of forces is achieved.
The packing of bubbles in foam tends to minimize film surfaces, and all cells are polyhedra. Foam, consisting of cells of equal volume, has pentagonal, hexahedron, and quadrangular faces. Moreover, all polyhedra have the same angles – 109.47°. A regular pentagon has angles of 108°, which is close to 109.47°. Therefore, pentagonal faces are the most numerous in soap foam. They are almost flat, and their edges are almost straight. And the most favorable shape for a foam cell is the highest Platonic polyhedron – the dodecahedron, its surface area is 12 pentagons.
Figure 3.
Dodecahedron, Platonic figure.
Figure 3.
Dodecahedron, Platonic figure.
But dodecahedrons alone cannot fill space (just as equiangular pentagons cannot fill a plane). Therefore, pentagons predominate in soap suds, but hexagons and even quadrangles also exist.
A regular quadrilateral has angles equal to 90°. And by 109.47°, they will only be equal if the edges of the quadrilateral are strongly curved, and the face is not flat, but strongly curved into a "saddle." A regular hexagon has angles equal to 120°. This is closer to 109.47° than an angle of 90°. Therefore, the hexagons in soap suds have straighter edges and flatter faces than the quadrilaterals. For surface area minimization, hexagonal faces are more advantageous than quadrilateral ones.
For any convex polyhedron, Euler's formula holds: the sum of the vertices and faces equals the number of edges plus two. Therefore, soap foam does not contain polyhedra with a single hexagonal face. There must be either 2, 3, or 4, plus 12 pentagons. Hexagons, and especially quadrilaterals, greatly increase the surface area of soap films. Therefore, the surface area of a rounded polyhedron containing hexagons and quadrilaterals will be larger due to its increased ribbing than that of a flattened or elongated, but smoother, dodecahedron.
The Kelvin problem, posed by Lord Kelvin in 1887, is to find an arrangement of cells, or bubbles, of equal volume, so that the total surface area of the walls between them is as small as possible [
3,
4].
Kelvin suggested that the solution to his problem was a structure made up of slightly curved copies of a truncated octahedron: a shape with six square faces and eight hexagonal faces, which you get when you cut the corners off a three-dimensional diamond shape. Kelvin's structure, as his foam became known, was believed to be the most efficient solution for over 100 years, until the physicists Denis Weaire and Robert Phelan showed in 1993 that there is an even better foam. The Weaire-Phelan structure consists of two different bubble shapes: an irregular dodecahedron, which has twelve irregular pentagonal faces, and a solid with two hexagonal and twelve pentagonal faces, known succinctly as a tetrakaidecahedron [
3,
4,
5,
6].
Figure 4.
The Weaire-Phelan structure (top) is made up tetracaidecathedra (bottom left) and irregular dodecahedra (bottom right) [
3].
Figure 4.
The Weaire-Phelan structure (top) is made up tetracaidecathedra (bottom left) and irregular dodecahedra (bottom right) [
3].
Although an infinite number of foams that beat Kelvin's structure have been found since 1993, the Weaire-Phelan structure remains the most efficient of them all. But whether or not there is an even more efficient foam out there, waiting to be discovered, still isn't known [
3].
We are not trying to fill the entire space with soap bubbles yet, but we will try to create compact dense shapes using the laws of the Plateau.
Real soap foam contains many dodecahedrons. They have 12 faces, and the surface of each dodecahedron hosts 12 neighboring bubbles. This situation can be simulated using identical plasticine balls. Twelve other balls can easily fit on the surface of such a ball without leaving any gaps. If the resulting figure of 13 balls is pressed firmly and uniformly, the contacts between the balls will flatten, eliminating the void (
Figure 5). (To squeeze out the void between the plasticine balls in such a figure, the plasticine can be heated slightly.) If the figure is then cooled and broken apart, we will see that the central ball has become a dodecahedron.
We've achieved a dense packing—a dodecahedron in a shell. Now let's add another shell to the "13" figure. Twenty pits are visible on the surface of the "13" figure. New bubbles in the soap suds will nestle in these convenient pits. Each pit forms at the junction of three bubbles. When another bubble fits into it, the surfaces merge, forming a node connecting four edges. The angles between them will be 109.47
0. After all 20 pits are filled, 12 deep holes will remain between the new bubbles in the new shell, each accommodating 12 more bubbles. As a result, a shell of 32 bubbles will form around the "13" figure (
Figure 6).
On the surface of this figure, each of the 20 gray balls is surrounded by six neighbors. And each of the 12 yellow balls is surrounded by five neighbors. On the surface of the ball are 20 hexagons and 12 pentagons. The gray balls in this figure (there are 20 of them) are those that fit into the holes between three. And the yellow ones are those that fit into the larger holes. Under each of these 12 balls lies a yellow ball from the first shell. The resulting figure of 45 balls is not only visually harmonious but also perfectly packed. All 12 balls from the first shell have transformed into dodecahedrons: each of them lies on the central ball, surrounded by five balls from its (second) shell, and covered by six balls from the third shell. As a result, it has 12 pentagonal faces. All 13 balls hidden in the figure "45" are dodecahedrons.
The difference between the angles of 108° and 109.47° is small, so the balls in the first shell are only slightly deformed. They are almost round. But in the second shell, the angle difference noticeably accumulates, and the 12 yellow balls of the second shell fit into their dimples loosely, with a slight gap. After this figure is compressed (after squeezing out the void) and the gaps close, these balls are slightly flattened. This increases their surface area. But it's better to be slightly flattened, with nearly flat edges, than rounded, but with curved edges and saddle-like faces.
Now let's add another shell to the "45" figure. Its surface is covered with 60 identical dimples, formed at the junction of three balls. And 60 gray balls fit easily and tightly into these dimples, without gaps. Within this mesh of balls, 32 holes are formed. Twelve of them have a yellow ball at the bottom, and 20 have a gray ball. These holes fit another 32 balls snugly. We placed 12 yellow balls in the holes with yellow balls at the bottom, and 20 red balls in the gray holes. After compressing these new balls, a dense, harmonious shell of 92 round balls will form, creating the figure "137" (
Figure 7).
Inside this new figure (in the second shell), 12 yellow balls have become dodecahedrons, and 20 gray ones have become polyhedra, each with four hexagons and 12 pentagons on their surface. As a result, there are no quadrangles inside the new figure, and there are relatively few dodecahedrons—25—but in the upper shell, all the balls are rounded. This figure is easy to assemble, without variations, with minimal effort.
Figure 8.
Matryoshka of figures "1"; "13"; "45"; "137".
Figure 8.
Matryoshka of figures "1"; "13"; "45"; "137".
The numbers 13, 45, and 137 follow arithmetically from the number of shells in the figure and from the geometry of the dodecahedron at its center. It has 12 faces, 20 vertices, and 30 edges. This geometry determines the number of balls in each shell and in each figure.
We glued identical balls together without gaps, but we can repeat all these procedures for these larger balls.
The "13" figures are angular and join together very awkwardly. Each of them contains only one dodecahedron. The figures formed by merging them will contain few dodecahedrons. But the "45" and "137" figures are smooth and rounded. We can, for example, join 13 "137" figures together to get a "13*137" figure. Or we can join 45 "45" figures together to get a “45*45” figure. And if you take 45 such figures, you can assemble a figure of "45*45*45" without any voids. Excess surfaces may arise at the junctions of the larger spheres, where hexagons and quadrilaterals may appear. But most of the volume within these large combined figures will be tightly packed.
Now let's return to elementary particles and see these numbers in them.
Let's compare the masses of the most notable long-lived and important bosons, from which we made "quarks," with the number of spheres in the packing figures without voids. Let's start with the mass of the smallest pion, π
0, which contains 45.
The next meson after the pion, its "first resonance," is the ɳ meson, which contains 137:
its heavier counterpart, ɳ´, also contains 137:
And now for the heavyweights. Z boson. It is equal to 45*45*45
The mass of the beauty quarkonium is half that of 137*137
The mass of the charm quarkonium is half that of 45*137
Mass of the Ψ quarkonium meson half as much as 45*45
To all these coincidences, we can add a close coincidence for the mass of the tau lepton
As a result, for all the elementary particles of the "first magnitude" under consideration, the mass is related through a simple factor to the set of numbers 13, 45, and 137.
By squeezing plasticine figures assembled from balls, it is impossible to squeeze out all the empty space. Therefore, a plasticine figure is larger than the same figure assembled from soap bubbles of the same volume. And in the new shell, the plasticine balls will fit less tightly. Therefore, to estimate the density of the new shell, the previous figure must be molded from a monolithic piece of plasticine. First, mold a sphere of the required volume. Then, precisely mark it, press indentations into its surface, and then place the balls of the new shell into these indentations.
Now let's add another shell to the "137" figure. A shell of 122 balls naturally fits onto the "137" figure using the same simple method, without effort or gaps. The result is the figure "259." All 72 yellow and gray balls lying on the surface of the figure "137" are transformed into dodecahedrons. And the 20 red balls from the previous shell are transformed into tetrakaidecahedra. This is a polyhedron with 2 hexagons and 12 pentagons.
Figure 9.
Figure "259" with figure "137" in the center.
Figure 9.
Figure "259" with figure "137" in the center.
The yellow balls in all the figures shown rest on yellow balls from the previous layer. They all rest on dodecahedrons. A dodecahedron has opposite faces parallel, so they can be stacked into neat chains.
Figure 10 shows how a column with a chain of dodecahedrons in the center is assembled. In all the figures shown, columns of dodecahedrons rise from all 12 faces of the central first dodecahedron. All these figures share the same skeleton—a 12-pointed star of dodecahedron columns. All these figures replicate the symmetry of the dodecahedron.
Let's extend the dodecahedron columns of figure "259." Place another yellow ball on top of each yellow ball and surround it with five gray ones, lowering them into the holes. The remaining space between these columns can be densely and beautifully filled with balls, as shown in
Figure 11. This is the fifth shell of 162 balls.
The result is a harmonious figure of 421 spheres. On its surface, the spheres are packed like in a crystal. This is the last harmonious figure. From this point on, quadrilaterals appear in the shells.
There are no elementary particles with a mass multiple of 259. However, for many particles, the mass ratio, as shown, is 1.89. If 259 is divided by 137, we obtain the number 1.89051. Accordingly, if we replace 137 with 259 in the formula for some complex figure, we obtain a new figure 1.89 times more massive. Multiples of 421 are common among the masses of elementary particles. The mass of the heaviest particle, the t quark, 172690+300, can be obtained using the formula 3*137*421=137031. The mass of the lightest particle—the muon—105.66 can be obtained by dividing 421 by four (421:4 = 105,25).
We've looked at the simplest shapes that can be assembled without voids from identical bubbles or spheres—shapes with a dodecahedron at the center. But you can also place, for example, a knot formed by the junction of four spheres in the center. Between these spheres (on the surface of the small pyramid), there will be four pits, into which you can place four more spheres, creating the shape "8," then "14," and so on. Ultimately, you'll create the shape "26," with four dodecahedrons at its center. You can also place an edge in the center, creating the shape "11," then "17," and so on. You can also place four "137" shapes in the center, or four "137 * 259" shapes.
Now let's compare our figures with the figures that can be obtained using the Weaire-Phelan dense packing principle. This package also has a dodecahedron surrounded by 12 balls. This is figure “13” (
Figure 5). The next shell should be placed on this figure so that all these 12 balls turn into tetrakaidecahedra. This is a polyhedron with parallel hexagons at the poles and 12 pentagons between them. Straight chains can be made from these polyhedra. Columns of these polyhedra fill the entire space in three directions. And the dodecahedra are located in the cells between them.
It is not a trivial task to assemble figures according to this scheme. Figure “13” is easy to assemble. And to assemble the next shell, you need to take the figure “45” (
Figure 6) and pull apart any two gray balls and insert one orange one between them. The same should be done at the opposite pole of the figure, and then place 4 more orange balls on the equator of this figure in the same way. As a result, 6 orange balls will connect all 12 yellow balls in pairs. After that, you need to remove all 12 yellow balls from the figure and put two gray balls in each hole, so that both of them touch the orange ball. As a result, the figure “63” will appear (
Figure 12). The toothpicks in this figure show the direction of the axes, the tetrakaidecahedra columns surrounding the central dodecahedron.
The upper shell of the figure "45" has 32 balls, and this figure has 50 balls, 18 more. And inside, both figures have the same figure "13". The balls in the new shell are very cramped. They are severely deformed. This shape is very difficult to assemble and difficult to compress tightly. It is not rounded, but angular. If you put the next shell on top of this shell according to the Weaire-Phelan scheme, then the 6 orange balls in the figure "63" will turn into dodecahedra, and there will be only 7 of them inside. For comparison, there are 25 dodecahedra in the figure "137". There is no mass multiple of 63 among the elementary particles.
Alternatively, instead of a dodecahedron, a polyhedron with tetrahedral symmetry could be placed in the center of the figure—with four hexagons separated by 12 pentagons. (Such polyhedrons are common in soap suds. They also appear in the second shell of the figures discussed above.) This polyhedron is formed by placing a shell of 16 balls on the surface of the central sphere. The 12 balls on the central sphere fit easily and tightly. However, the 12 yellow balls of the next shell (figure “45”,
Figure 6) fit loosely. They require compression to squeeze out the void. They become slightly flattened. Only the next shell fits snugly into the depressions without much effort. Placing a shell of 16 balls on the central sphere is difficult. They feel cramped. They require compression from the sides. However, the 44 balls of the next shell fit easily and tightly into the depressions of the "17" figure. The result is a solid figure "61".
Figure 13.
Figures “17” and “61”.
Figure 13.
Figures “17” and “61”.
But the new shell doesn't fit harmoniously onto the solid figure. It just falls chaotically, without falling into the pits. From the "61" figures, you can assemble a particularly strong "61 * 61" figure. It contains 3721 balls. If we divide this number by four, we get a value of 930.25, close to the mass of the indestructible proton (938.27), the lightest baryon. The mass of the beauty baryon is Λ
b0 = 5619.6. This particle contains both a baryon and a beauty. If we trivially sum the number of elements in the "61 * 61" baryon figure and the "137 * 137" beauty figure and divide by four, we get 5622.5, which is very close to the mass of the beauty baryon.
Of all the figures considered, the lightest is figure "1." This figure is comparable to the mass of the eternal electron (0.511 MeV).
As a result, we see that from the simple principles that nature uses to create foam and living organisms, we can obtain a set of numbers that are multiples of the masses of elementary particles. From the elementary, we obtain diversity. Such figures can be found both in living tissues and among gas hydrates.
Now, using known models, let's try to derive electric charges, interactions, and antiparticles.